While I actually agree with you on this argument, I do feel the need to point out that the official translation changes the wording of Peros's speech so that he doesn't actually say he would have lost. He just says they needed su long to "stand a chance", and it comes across as a taunt about their power up being unreliable.
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You misunderstood Peros... It's like he was saying that if you continuously bet big in a casino then you might get better chances to win...