I've had to debunk this myth multiple times in this post already, I'm not sure who started it. Legumes do have all the aminos and in sufficient amounts.
Also on bioavailability, it is a double edged sword. For example heme uptake is greater than mineral iron, but your body has very little control with inhibiting uptake when you already have adequate levels. With the mineral form your body has various ways to promote or inhibit uptake. The same is true of your example of vitamin A. You can pretty much eat as many carrots as you want and suffer no ill effects, eating too much liver or taking too many liver oil supplements however can lead to poisoning.
Thank you. One reason I stuck with ee instead of one of the other instances I made accounts with was that eventually this place was the only place I could go where I could still see content from all the instances I wanted to see. I couldn't just make an account with one of those instances because they were generally defederated with one another.