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.
Well, you know in the first place that you will lose eventually, so there’s no reason anymore for proper bankroll management. Just bet on your favorite games and have fun, that’s the only important there. And most of all, bet only on your intended money, not those that will be used to pay your bills, then you won’t face future problems even if you lose them all.