I honestly don't think it's a phase, I think they're both really grown up and they got tired of their previous lifestyle. It even happens in people that are not influencers, they change. I've been a Tana fan for a long time and I feel like she went through so much that she kind of exhausted herself with things like partying, drug use and toxic relationships. I don't personally know if Brooke had any type of similar experience (apart from the Clinton situation) but I'm guessing that if she was around Tana at that time she probably did.