In the old testament, polygamy was not only allowed, but required under a specific application of the law. Homosexuality however was and always has been an abomination, punishable by death.
Therefore, I have far less issue with polygamists than homosexuals. Remember, the punishment for polygamists is multiple mother-in-laws.
Ha, that’s some punishment! I barely survived one. ;-) But yes, one can argue that polygamy still rests on the duality of nature and the 2 sexes, and is fruitful, and biblical. All true.