Doesn't it though?
I really like to sit around and think "mmm I would just love to have a sub. My own little girl who I can take care of and develop and be proud of and post her developments up on the fridge"... I would realistically really LOVE that.
I'm not going to turn down an opportunity to have a harem though. No. no, no. I can't quantify how stupid that would be to turn down.
I agree that I personally would rather be upfront about things I like and be told to piss off for it. In the end honesty is how to get everything you want.
That being said I could easily change my mind. Some people just aren't monogamous material. Not that there is anything wrong with that. Not that they're any less awesome. In some ways being able to share your sexuality with someone and really open up that YES you do want that other sub to play with for the night is a gift all in itself.
As far as poly relationships being more stable than mono (not that anyone here has said that directly)... I can't agree with that. Relationships end, change, develop, blossom on their own merits not by involvement. I have been in poly relationships that broke down when they went mono and vise versa.