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.
Bankroll management is simply the process or ability to be able to effectively manage the amount of money you have at hand, which could be either the money you have in your fiat traditional bank account or in your crypto wallets, and not necessarily the amount of money you have on your casino account. Because what proper bankroll management does, is that it prevents you from excess losses while gambling, knowing fully well that it is a game of luck, and as such it's wise to gamble what you can always afford to lose, rather than continuously redepositing whenever you exhaustel your casino account balance, with the mindset of getting lucky and hit a jackpot, which is what people with no bankroll management does.
Because, thou, bankroll management will not help you hit a jackpot, but rather, it will help you limit the amount of money you lose, while gambling responsibly.