Sure we would have made more money if we invested more in our best trades, but we would have also lost more money in our worst trades if we had more capital.
Most traders end with loss because they don't allocate their trading capital into equal pieces. They trade all capital in one or two positions. If they are lucky and right with decision, they get win even big win. They continue trading like this and if they lose, they lose capital quickly too.
When it comes to trading it's all about the returns in percentages and not absolute terms in my opinion. You either make a profit (positive return) or a loss (negative return).
Because usually traders have lost positions than won positions and it is also a consequence of bad capital allocation.
Having a large capital base to start trading with us no guarantee to make money. In my opinion it's rather counter productive, I would focus first on becoming a good trader before investing large sums of money.
If you are a bad trader with small capital, you can not suddenly become a good trader with big capital.
If you are a good trader with small capital, you won't automatically become a good trader with big capital. You might be or might not be because the pressure from big capital is bigger than from small capital. It can adversely affect your decisions.