Polygamy Hairstylists

Why do polygamists all have the same awesome Rick Astley-inspired hairstyle? Is that something the men find attractive? It doesn't make sense to me. If I'm going to have 10 wives - I'd want them all to look a little different - because isn't variety the reason for being a polygamist in the first place?

I bet the official hairstylist of a polygamist compound has a pretty easy job. Not much haircutting or styling going on. But I bet the electric bill from blowdrying is a bitch.