Ok well, here it comes!
I've always had Roosters and I've never had any trouble other than the typical Roo that goes aggressive, which is an easy fix. I completely disagree with people who say the Rooster doesn't help with predators- my Roosters are always watching and they will immediately warn thew flock if they see a hawk, or if a hen goes off on their mindless excursions and has separated herself (aka easy prey).
Let's also not forget that you can't raise your own, home-bred chickens without a Rooster, which is a very special thing. So there is your counter-point, I love Roosters and think they play a very important role in a flock, most especially a free-ranging one.
And, my last point- if they don't experiment with a Rooster- how are they ever going to know? You can read 10,000 books and posts about Roosters but that will be just a fraction of what you will learn from having one. That's like saying "hey go read about skydiving, you don't actually have to do it if you read about it". To deny the experience is a ridiculous approach to life in my opinion.
I agree

. Although, I don't think I'm going to be buying a rooster any time soon. My family and I are
I say go for it, if it doesn't work our for you for some reason (aggression, other) - then find a proper place for your rooster and you have YOUR answer. Heck, if you try and it doesn't work- you can send me your Rooster.