From my point of view, bankroll management is a skill that exist separately even outside gambling, and it has to do with intensed discipline unlike gambling strategies that we change often to suit our desires or give us hope of wining. I think it's very important  that we all have the skills of managing our bankroll else we'll  end up regretting gambling in the first place. The problem with most gamblers is staying disciplined, I sometimes find it difficult to stick to the plan but i never let that happen too frequent that it becomes my main habit. We just have to keep fighting to keep ourselves discipline because the consequences of indiscipline is too expensive.