That says a lot about the husband's "skills."
Considering all the other lifestyles that are lauded and supported, I'm not quite sure why polygamy shouldn't be allowed. I can see how it can create the potential for abusive situations, especially when religion is in charge of who marries whom, but I can also see some positives. (Many hands make light work, large family support system, etc.)
Not my cup of tea, to be sure, but I'm not sure I see serious problems with it either. It requires a certain mindset and cultural immersion to even be acceptable to a woman, so it wouldn't appeal to the vast majority of American women.
Also, while I don't agree with anyone being "forced" into marriage, there are marriages arranged all the time in other cultures, and it isn't seen as being forced; they're "arranged marriages." Again, not what I would want for my daughters, but if someone has been raised expecting that to happen, I'm not convinced that it's terribly harmful.
What is harmful is when a woman is in an abusive marriage that she can't escape, and she's fearful to go to law enforcement because they may prosecute her or take away her children simply for being in the situation to begin with.
Legalizing polygamy could potentially provide protection for women and children who are in abusive situations but have nowhere to turn for help without getting themselves into trouble with the law.