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.
For me it doesn't matter if it's solely depends on luck but i know for sure that bankroll management is very necessary to every player whereas every gamblers. You may tend to raise the bets and get all the money sucked into gambling and you'll decide to go all in again having a mindset that your luck can guarantee you a win, but definitely you have to bear in mind that at this point the amounts used to achieve that should be considered and maximize, therefore there is need for bankroll management in every game.