No; He’s saying how to deal with it IF and AFTER it happens.
“I’ts not good for man to be alone” didn’t mean for him to have more than one.
Adam only lost ONE rib...
To Adam he said, “Because you listened to your wife(s?) and ate fruit from the tree about which I commanded you,
Like I say, there’s no question that monogamy is greatly to be preferred over polygamy. Monogamy is to be the norm. The Bible seems clear about that. But that isn’t to say that God didn’t tolerate polygamy, and even require it in some circumstances, notably leverite marriage. It’s one thing to say that polygamy is disfavored (it is), it’s quite another to say that it’s always illegal (it’s not).