I don't like the picture that engineers may not like pilots. There is certainly the attitude amongst some of our colleagues that engineers should not touch a perfectly well working machine.
There is also the attitude amongst some of the engineers that pilots should not touch an aircraft as otherwise it may return in a broken state.
There are no Jack Patronies out there who can fix all and sundry in more or less unconvential ways; this, of course, is also valid for pilots, there are no heroes who can bring an aircraft back with all sort of things broken and not follow any logical procedure.
The past has shown, and the future will proof this without any doubt, we are all sitting in the same boat. If there are no pilots to operate, no aircraft will fly, enginners will be just "daily checkers"; pilots cannot operate if engineers do not provide a workable machine. We need to work together. In all respects.
And about the environmental issues, well, this comes down to the individual. There are pilots and also engineers who have their fair share of entertainment as they desire. Others just follow their job as they are supposed to and find their outside world at home with friends and family.
Is there actually a difference to other industries? I doubt very much, change the names, change the skills and you will find all these "off-the-job" thingies as well....