Man, back view, guitar by dafni_19870, CC0 Public Domain

What exactly do judgements do for us? Motivate us to do "better" next time? Inspire us not to fail? To help us work harder at not-sucking at guitar? 

I'm not convinced that tethering ourselves to judgements is the best pressure we need to learn guitar.

The problem with judgements like "good" or "bad" is that they require us to be more mentally active than we need to be. It's like having to think about every single muscle that we need to walk around without trusting our legs to do the job for us.