You are deeply mistaken. Martingale strategy does not guarantee that you will win, because each subsequent round is in no way associated with the previous one, and the probability that 10-15 rounds will be losing still exists. Most likely it all depends on your luck. I used to play Martingale and I'll tell you a secret that if you use this strategy you will lose all the money you have. So better don't push your luck and play just for fun.
Whatever the technique, will not guarantee absolute victory.
So yes, we agree with you. the martingale technique or you can say the martingale strategy, can be applied to various gambling games. and to be honest, most of us gamblers have done it. but basically, it all comes down to luck again. if this technique, applied to each betting round, and as you said. then the end result, someone will get a big loss.
Even I often do it, but with a different method. every doubling, does not have to be done in every round. at least, we play involves experience for any type of game. I prefer to play Baccarat, any techniques or strategies can be applied. but don't be like the martinggale technique which always doubles the bet in each round. at least, I play according to experience and in Baccarat it can always be analyzed. however, if playing with infinite time. in the end, the table wins.
So the point is, just play for fun. however, occasionally doubling the bet is necessary. the point is, we have to know when it's time to stop.