"Font of All Aviation Wisdom that - for some people - doesn't translate very well into a work situation (such as charter and an airline cockpit) where you need to be a bit more humble, receptive, curious."
Just general life skills that are all too often missing..
If you did any job but only used that job to get somewhere else you will never have 100% commitment to that job. I saw it all too often in the IT world. I would employ people onto a help desk and 2 weeks later they were wanting to be network/server admin. They never cared about the initial job. Same applies for the majority of instructors. Most flying schools are now factories..the vast majority of instructors just want to fly something bigger/faster/better or get paid so little of course there is no love for what they do.