How can Bruce Lee not beat Mayweather in a boxing matcb?

If he hits like a heavyweight then it's like if Mike Tyson punched Mayweather. If he hits him once, he's hurt. And he clearly hits like a heavyweight according to people who sparred him. He's also very fast so how can he not win? Just punch him once.

How can Bruce Lee not beat Mayweather in a boxing matcb?
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