Yes it is, but milk’s nutritional profile is also terrible. If it’s just to make a latte then nutrition doesn’t matter much, and the plant milks can be superior for coffee anyways depending on the bean.

Not sure why the other guy linked you a sheet about seitan… fyi what vegans have limited access to is not protein, but rather specific nutrients like l-carnitine. Takes some forethought to order the supplements but it’s hundreds of times more cost efficient than buying beef anyways