ShiroKuro I love this discussion! I also find that the more I focus on avoiding wrong notes, the more musicality suffers.
And now for something even more colorful....
For some years I did competitive pistol shooting.
Not the stand-and-shoot-accurately type, but the run around and shoot a bunch of targets as fast as you can.
Then the score is based on a formula that takes into account both the time and the accuracy.
The debate between "practice slow accuracy and work on speed" versus "practice shooting fast and then try to become more accurate" also exists in that sport. And as in that case, I think with the piano it doesn't need to be restricted to just one or the other.
But the particular point your comment brings to mind is that that sport also has some targets that are supposed to be shot and others which are off-limits. And they may be positioned adjoining each other or even overlapping.
Universally, the advice is to focus on the target you want to hit, not on the target that you're trying not to hit.
I find that translates psychologically to the piano for me. I focus on the notes I want to play, not on avoiding wrong notes.