I have always maintained that we are naturally inclined to be one or the other.
I don't mind doing basic wiring and LRU/component changes with BITE or simple test (like we always have done) but I'll never be happy tracing complex Avionic defects and as stated - Most B2's who are now B1 would run a mile if asked to replace a fuselage frame or even replacing an engine as a supervisor with a few mechs.
So long as we recognize our limitations and don't stray into unsafe practices because our masters want an ever cheaper and smaller workforce - we'll be ok.
I have a mobile phone full of expert colleagues numbers all over the world when I'm stuck on my own somewhere and a second opinion is worth it's weight in gold too. Contractors stick together