While yes you can get protien on a vegan diet. One, it is hard to get enough of it. Two, it is not as bioavailable.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3905294/#!po=1.27119
Out curiosity sage you've never wanted to eat a steak just to see what would happen? Why not just eat some steak, eggs and cheese? Got nothing to lose to. Try to eat some meat for a month. And, would love to hear your feedback. Trying to break the American record in the hundred miles, guess what Zach Bitter eats? I highly recommend his podcast he did on the Joe Rogan podcast. In retrospect, listening to this podcast was the beginning of the end for me, as far as being vegan.
https://youtu.be/RsO61ZsihQM