There is something powerful there. A man who adds wives is literally building up his household. Hence the Bible commends wives as wise who embrace polygamy.
That is entirely different than the "no self respecting woman would go along with that" persphective @Daniel DeLuca ran into.
Dare I say also that the Bible sees adding multiple wives as wise and a blessing?
Thought of something when I read this again. Self respecting may as well be a synonym for selfish; which is also the opposite of wise. So Proverbs 14:1 comes around full circle with that saying.
That should be our retort to 'no self respecting wife'....."you mean selfish". To which they'll respond, "no the man is selfish" to which you can point to the fact a wise woman builds her house, not rebells, and God favors the man who finds a wife (first or second).