Is polygamy good for society?

I feel like I've seen a trend online, mainly in the redpill/manosphere space, that says that it's okay for a man to cheat. But it's a one-sided open thing. Basically polygamy.

If men were given the safety to cheat freely, while still coming back home to their wife/girlfriend, would it be better for society and or relationships in general?

Is polygamy good for society?
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