But for plebs like us who don't manage billions, I believe the difference in profit would not be that large that it wouldn't really matter. 
Yeah, every investor will actually earn the profit they deserve. For example, people who buy 1 bitcoin at $20k and if they are still holding up till now and peradventure Bitcoin gets to $100k during the bull market, that means they have made $80k profit, which is a nice one, but we only invest that amount that we can be able to raise and invest freely without causing ourselves any psychological issues. There was a topic I raised in the past about some friends wanting to set competitions among themselves on who would actually invest more in Bitcoin. In a normal sense, it's a good contest among themselves, but some of them did not realize that their financial income is very small compared to that of their friends.
I always tell people that it's more wise to just invest the amount that you can peacefully hold until any time that you have seen that the price is very bullish and you are satisfied with the profit you are seeing in your portfolio.
Some people see that their friends have bought 0.5 bitcoin, and they also want to buy that same amount of bitcoin without even realizing that their friends are earning more than them and also have fewer responsibilities than them.
Yep. If we are going to compete, we should be competing with either some abstract version of our alternative self or competing with someone of similar financial and psychological circumstances, and surely there are not going to be people with exactly our own same circumstances which is another reason to create standards that are individually tailored.