I believe that if we're playing a game with a house edge, where winning depends purely on luck, then bankroll management doesn’t really matter.
What you deposit is already intended for gambling, so whether you go all-in or divide it into smaller bets, the reality is that bankroll management won’t change the odds. It just adds an extra layer of stress in making decisions that, in the end, won’t really affect the outcome of a luck-based game.
I do not fully agree with this statement, because bankroll management is still needed, as I experienced today, making a deposit of only a few dollars to play slots, playing with a minimum bet and managed to get good results of $ 30 more but confidently increasing the bet amount and the results were very bad, so bankroll management is still needed even though it will not increase the chances of winning but with a small capital and betting big then you will finish quickly.