Yes, it is a gambling strategy in general. Gambling is a luck game, we never know when our luck will come. Then, bankroll management can help you play longer & wait for that luck I mean. Let's make an example.

1. With bankroll management
Your luck will come in the 10th match or hand (if it's a live casino) & with $100 bankroll, you can get your luck in the final match or hand if you bet $10 per match or hand.

2. Without bankroll management
Still with the same bankroll ($100), your luck will come in the 10th match or hand (if it's a live casino). But because you're in a hurry without bankroll management, you make $25 bet per match or hand, which means you can only play maximum 4 matches or 4 hands.