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.
If you accept the fact that it's just a game of luck, don't bother stressing out if you'll probably lost in the long run. Bank roll management wouldn't be a significant issue here but the emotions behind every desire that a player wanted to happen which is to win. Unfortunately you can't beat the house and their system that runs the odds on sports betting. Each team of sports had their respective capabilities, it's just being analyzed based on statistical data but in reality the discrepancy always matters most.