I didn't say it's not related - it IS related, but it is not related to the ABILITY to create MySites, and it does not require MySites to BE enabled. I will try to find you some documentation on it. It's obvious that without the Personal Site permission, people can't create MySites, so the ability to interact with personal features without a MySite should not scare them (not sure why it does or what made them think that). it allows the use of colleagues, which is something that shows up on Mysites by default, but they won't have a MySite, so it doesn't matter. They can use the other features that come with it that are related to profile information.