Whether it is 1% or 10%, there is nothing wrong with spending a lot as long as it is our extra money. But what we usually think is that if we gamble, we certainly lose which gives us some pressure. But if we just think I do this to have fun, even spending 10% could give us regrets. Unfortunately, we think of winning which absolutely changes our way of gambling and mindset, and when we lose, we tend to gamble more to take back our losses. We've been driven by our wrong mindset which is why we always feel disappointed and this is the reason why we don't feel satisfaction anymore.
1% and 10% are a huge difference in spending, sometimes we can already generate other sources of money from a few percent like that, even though those are the amounts we can earn more but it's bad to waste the opportunity and give it away on meaningless entertainment like gambling. Furthermore, you are right that a gambler's position does not come as a guest of entertainment, they come with the pressure that is generated from this as well as a forced win, become a puppet and lose their emotions with this endless game
I think spending 1 - 10% will not be too big of a problem because it is still a small amount of a person's total income, especially when they have an income that is quite good or equal to people in general with minimum wages, because if it is not between 1 - 10% then how much more should be allocated for gambling? I understand that a smaller amount like 0.50% may be better and safer but most people will not be comfortable because with that amount they will not be able to enjoy gambling for quite a long time, at least half an hour.
If you say that it is too big an amount to waste then I would say that there are two choices: you still have to choose an amount between 1 - 10% to bet or don't bet at all, I think there are only two options .