I'm usually in full agreement with your wisdom and advice on here, but I made a decision along these lines only to have a conversation later with a friend who made me regret it.
I fell out with a long term friend/ musical partner with whom we had transitioned our blues covers band to an originals blues-rock band. We fell out over something that seemed at the time irreparable, leading to me walking out.
Met up with a pal, drummer with a very well known band from the 80s, still doing the nostalgia circuit every couple of years, who had also just had a bust up with the main man. He thought it may have been the end for him, but he was called the next morning and main man said that the row was because they both cared about the point so much, and that was a good thing.
Looking back (there's an unintended clue there) that was exactly what had happened between me and my singer.