This is something that I also think about because as a player I am very low to medium because there are few things and bonuses that benefit us, and if there are bonuses it is very difficult for us to enjoy them because in reality the big whales are the ones that have a lot of benefits and I understand them because playing with so much money, casinos have to have them sweetened, while a low-budget player is trying other casinos or luck, sometimes these things are understandable.
Big whales can enjoy quite a lucrative bonus because they have a budget to bet that doesn't have a limited amount so the casino will give them a lucrative bonus because they also give quite a large amount of money to the casino.
On the other hand, big whales can easily complete every requirement for the bonuses that are given, so it's much different from us, who will have a little trouble getting bonuses and being able to enjoy them.
Indeed, casinos must be able to respond to this kind of thing because even though we are only small gamblers, we also spend a certain amount of money every time to play and bet.
Yes I agree with you that big gamblers always bet big amounts. Because they have huge gambling budgets. And because of this they can level up very quickly and get bonuses. So I would say that the bonus facility is not for everyone because if you are a small gambler and try to get bonus by leveling up you may lose a lot in the medium term and it will hurt you financially. So if you are not very strong financially then use gambling only as a place of entertainment without the intention of leveling up.