Can you imagine the state of the site after 2 power users have a holy war over whether the recipe is meant to have salt in it or not.
Cooking is not objective so it would be impossible to properly collaborate or decide if an edit made the recipe better or worse.
Like I have my way of doing things... and it's the best because I have my own taste profile... but I'll try your way to see if I'm wrong.
Things like a bagel "toasted" vs "just warmed," dishes that have a variety of regional variations (e.g. a lot of slavic dishes like borsch or stuffed cabbage rolls where I've gotten yelled at by people for pronouncing it the Russian way or making it the Slovak way instead of their own nationality's style) seem to bring up far more intensity than I'd have thought possible, but, you know, I learn more about my friends that way and we've remained friends...
in an internet comments section? Tough to maintain that kind of civility, I think. possible, but tough.
Its better to have each post be owned by someone and then have a ranking system to sort the most liked versions.
You could rank them or something, but the reason I like YouTube is that I can generally get a sense of a person and what they like. If they like similar things to me, I'll probably like their versions of recipes. Inauthentic adjustments or weird herb profiles included.