There is no problem, people are just lazy and spoiled. How else can I describe encouraging cheating for the sakes of avoiding a challenge.
You can drop friendship (green) line on your BFF and after that get another BFF.
I did that with my two sims as had no problem. The problem is the trait itself. Currently it's so utterly broken (not on every sim and not in everyone's game) I suggest not risking with getting it but skipping that aspiration till the trait gets fixed.