Because we are a competitive, authoritative site. I love the idea of Speed-RAing (ya know, like SAing? or SA+ing?) but it's just a combination of two things we have already (SS times + RA).
In short: it'd be a blast, especially route planning, but it'd be hard to take it seriously. Super Sonic 1-style TA/RA was awesome, honestly, so perhaps a hack could be made in it's spirit, and it'd be this only better, without ruining our charts?