I also found that underneath the acceptance of polygamy as a choice, there still ran a feeling that there really was something wrong with women who chose it. The idea that something must have happened to these women for them to be so lacking in self-esteem. It was acceptance tinged with pity for polygamous wives, yes they can accept intellectually that someone may choose it but for themselves it remains an emotionally negative situation for them personally. Acceptance of polygamy as a valid lifestyle choice doesn't equate to enthusiasm for choosing if as one's own lifestyle, I don't see an appreciable number of women wanting to choose it for themselves.
The same attitude exists towards women who marry men twice or more their age yet many (most?) people know at least one couple in their neighborhood or PTA who are happily married and fit that mold. So maybe you would not get all the single women in your town all marrying into polygamy but in a nation as large as the USA just a percent of women would mean hundreds of thousands of women, if not more, willing to give it a try. My speculation is that the number might be more in the low double digits if the man they were interested in was considered an ideal specimen.