It is precisely limiting yourself from betting too much that really practically guarantees you peace of mind in case of a loss and, in principle, this ultimately makes your game comfortable and enjoyable. Now it seems to me that experienced gamblers do not even think about the optimal bet sizes, it happens to them as if by itself, automatically, intuitively, but correctly. But that is why he is a wise, experienced player, so that he never falls into despair during his game and does not feel sorry for himself for being very unlucky in cases of a series of losses.
And so, really, everyone decides for himself what type of bets he likes the most, express, teaser or something else, and accordingly plays that way.
I also understood this after a long time, that you need to place bets so that it won't hurt later even if you lose. Young players may not understand this and they will want to win more and more, but this is not right, because in the end they will lose everything due to their unbridled passion. In addition, I understand that there are such concepts as dispersion, which can give us many losses in a row even if the bets were good. And even this will not upset me and I will remain calm in the end, it turns out that experience and knowledge really affect many things, including our emotional balance.
In my opinion, it is precisely this mental balance after a series of losses, which, as you rightly explained by the dispersion in the game, which is caused by simply random processes embedded in the game algorithms, and is the indicator that distinguishes a wise and experienced player from a beginner or even an insufficiently experienced player. This is the border that can be considered the border of skill in gambling. In my understanding, the very essence of gambling and its influence on our life and destiny, this is another test of our passions and our wise and philosophical attitude to life. This is an excellent indicator of a person's maturity.