ENOUGH IS ENOUGH:
I see what you’re saying but you are still missing the point about why these unflattering things started to be said about these trades people in the first place.
Witnesses with these jobs/trades made it a point to demean or shun other people in the congregation with college and/or white collar employment.. They made it sound as if they were morally superior or more ‘spiritual’ than these JWs with the college degrees, etc.
It became particularly touchy when these relatively uneducated JWs were counseling people who should really have been seeing professionals instead.. So the criticism and unflattering remarks about ‘window washers/janitors’ got started. Unfortunately, the label stuck and it offends some!.. But, don’t forget Witnesses with their stupid biases started it all.