I have a friend who's an ENFP and I think tritype 378 -- strong 7 fix -- and the fact that I've been friends with her for so long, has trained me pretty well to deal with people who make their life decisions this way. I think it's also taught me that life is never as predictable and linear as a 1w2 would like to believe.
I do disapprove of some decisions she's made. For example: she doesn't want to go to college, and while that isn't something that I disapprove of in itself -- plenty of people do well without undergrad degrees -- I think that
1) Everything she could possibly want to do career-wise would benefit from college; and
2) Her reasons for not going ("I'm not meant for college") are almost definitely based on fear of college, fear of failure, and fear of boredom, but she's in denial about it.
I've told her how I feel, once or maybe twice. She knows my opinion, and will go off and do whatever she wants; she's a free spirit. In the meantime... There's a lot of wisdom in the Serenity Prayer, regardless of whether or not you're religious. When there's nothing I can do to stop her, there's no point in keeping on fighting to change her mind. It's a waste of energy.
I think that any 1 who has a big group of friends who disagree with them on key issues, has learned to accept this same philosophy. We do have an internalized "right" and "wrong" way of going about things, but at the same time, surrounding yourself with only people who agree with you becomes a bit cultish, and no one would be there to correct you if you did end up being wrong.