On the other hand, if it helps to let go - one of THE most important abilities a brain has - than that is a big potential benefit.

A long time ago but in a place not so far away, as a teenager with some love drama, I once was completely cured from a weeklong lost love hangover in a second when I realized I never had a chance to begin with. That was a very enlightening moment about how "love" works. My brain let go of the idea and that was that, I was free again with zero negative effects remaining.

While it cannot be controlled at will like moving an arm, attitude does have a big influence. You can make your brain move towards letting go. That's not covered by my anecdote where I discovered the effect by accident, that is something I realized over time. Avoidance or confrontation (of the problem) is, I think, neutral, it can work with either.