Huh?
I don't see your problem. The first paragraph you quoted comes from me proposing a rule that would allow people to use whatever emulator they choose, even put videos on youtube for their fans or whatever, while not giving them the benefit of using very simple methods to cheat if they get called out.
The second paragraph is me aknowledging the fact that it might seem silly to allow the use of an emulator but not using it for proof, even backfiring on legit players. However I do think that no'one in their right mind trying to prove their legitimacy would use a tool so readily available for cheating in the first place when good alternative solutions exist. And if allowed, should put the provider of proof at a disadvantageus position in some form which would need to be formulated among the rules.
If you trust a player to submit a stat without recording, and you trust that player to submit a stat without recording, it follows that a video submission from the same actions should also be assumed trusted, regardless of if you can bring even Jesus in to intervene for you to help you TAS the game.
No doubt, there's ways to go about the system and find ways to cheat, and make it look spotless on a recording. No matter how many rules and edicts we put in place, it's always going to happen. While I understand your intent, this rule would simply implement far more hindrance on players and reduce several convenience factors on fair players, while not really doing much to the general state of affairs.
Huh?
This is why I changed my initial stand point slightly. If I trust someone with their stats I honestly wouldn't care if they used Gens Rerecording or not. It's not a question to begin with since no explicit proof is necessary at all. But if they do fall under the radar, they shouldn't be able to slip away so easily if they do use for example Gens Rerecording 11b.
The second part makes it sound like laws shouldn't be enforced, because there will always be criminals. There's always a balance between too few rules and too many since you don't want it to be easy to cheat but you don't want to make it hard to compete. I personally don't think that banning a TASable emulator (for Genesis at least) from competition would provide such a hassle that someone wouldn't bother to compete at all, while being completely ineffective at stifling cheaters.
The only person I've heard complain about that so far is Sonicboom and he even said he would accept such a minor inconveniance if it would help the site in general to catch cheaters. As for your case, I don't know enough about your setup but it initially seems there are a few ways you could improve your setup for doing attempts, while not using Gens, without paying a dime.
There are also some tradeoffs you could do. For example if you're so desperate about using GensPlus or its record/replaying features, provide a community savestate on the level select and tell people that you must load that first, then create a giz. Synching a Gens Rerecording TAS to GensPlus from a savestate was fairly hard but was made a lot easier because I could create the starting point myself. If someone were to not use it there are ways to tell I'm pretty sure at least given someone creates a giz within a few minutes (or hours? Days?) and always loads the savestate before going into a level.
Inuyasha also brought up a valid point that no one's responded to about emulators with TAS features also tending to be the most accurate ones because they're open-source. I'm no emulator expert here but if anyone wants to list some highly accurate, closed-source emulators without TAS features, be my guest. Inaccurate emulators are just as bad as emulators that facilitate cheating.
Just like converting a TAS to a non-TAS emulator with replaying features is a bit of work, rewriting the source for one to include such a feature is a lot of work for something as simple as submitting a stat for this site. There has to be some form of line where the amount of work to cheat is considered unreasonable. You could disassemble the game, hack an input-player in and put a TAS in a table that executes when you hold B while going into a level which plays a TAS that was made with certain timer values in mind which are written in RAM at the start of the level, then buy a flashcart and play on a real console. But no'one would question something like that unless it's obviously TASed because that amount of work to get it going would be completely unreasonable for the achieved result. There are currently no restrictions on what emulator a person is using except the obvious like reasonable accuracy, full speed etc. Given the amount of work I had to put in I don't think it's a stretch to ban for example GIR's (that don't use savestates) while banning Regen (which I think is closed source?) if it is released open source some day would be.