I fully agree with you Slipin, on everything you've said in your previous post. Great advice especially about not being able to master every aspect of playing guitar.

The practicing mistakes part is only there because beginner guitar players need to build confidence. If they are constantly thinking about what mistakes to correct, they will feel overwhelmed. As you become more advanced, it is ridiculous to practice mistakes. You play guitar exactly how you practice guitar. If you practice mistakes, you will play with mistakes!

The key is: what specific goal are you trying to fix?

You can't fix everything at once, so you ignore some mistakes to focus on a specific problem you want to improve. Otherwise your brain would explode. Hopefully this makes sense?