I guess you never worked on a complicated web app that was 100% jQuery, because web frameworks were not a thing yet.
I also get tired of the arguments from ignorance. The you don't know how hard life is type of bullshit arguments. I do know because I have done this work, probably much longer than you, and its not as challenging as you are claiming.
Add to it dev churn each 6 months one dev leaves an new joins full of fresh new ideas how to jquery. In the meantime also 2 freelancers adding their stuff.