"sometimes its hard to convince certain musicians, for some stupid, blocked reason,..being as we are dealing with sound, learn more than chops, learn sound, and sound engineering!!....Even if you are doing acoustic sets, learn blending of sound!!..it is a huge must!!"

Actually, you don't need to have any electronics to need to knew about sound!

This is why we have people singing/playing too softly/loudly! People who seem to be unable to blend in with others!