Protein quality matters as much as quantity. I like beans and rice, but the protein in red meat is more digestible and has the optimal ratio of amino acids that humans need.
1. The human body can synthesize protein except for a few amino acids. These are called "essential" amino acids because we must get them from food.
2. Protein "quality" refers to the ratio of essential amino acids, specifically how close they are to the ratio of essential amino acids in our bodies. This metric is used to gauge the rate of absorption of proteins, not the overall amount of absorption.
3. Red meat is not ideal protein quality. Whey protein is actually a lot better because it consists of amino acids in ratios that are better for absorption. Also better than red meat is... rice and beans.
If we're just going to shift goalposts, then you should be eating eggs because they are the benchmark for protein quality and they're considerably cheaper than beans per gram of protein if you have hens. And long term storage of eggs without refrigeration or freezing is a solved problem too, so winter is no problem.
But honestly I think you have some kind of vegetarian agenda, and that's causing you to use some pretty tortuous reasoning to reach your desired conclusions.
https://www.researchgate.net/figure/Protein-quality-assessme...