>>361902406
it depends what people you play with, if you play on public and have an avatar that is rated 'poor' or 'very poor' theres a 90% chance that most of the people wont be able to see your avatar at all and theyll see you as the fallback dog or w/e you choose.

fallbacks arent just for quest users, a lot of PC users play with 'normal' safety settings to block crashers and people with the annoying e-boy/e-girl avatars that lag out the server. the normal setting by default blocks most 'poor' and EVERY 'very poor' avatar, and some 'mediums' if they have special animations or dynamic bones etc. 

if you play exclusively on private PCVR only lobbies where everyone is using lower safety settings because they trust eachother not to crash them, then yeah you shouldnt care about fallbacks. but if you play publics you either want a fallback or you want to optimize your current avatar down to good or medium so people will just see that instead.