[rimliu]

Non-serious: maybe they have to spend so much time chasing the latest trends in JS frameworks that none is left to learn about alternatives.

Semi-seriuos: I am afraid many honestly believe that JS is the best language and has the best ecosystem.

I consider myself lucky having learnt programming back when you had no choice but to use different tools/languages for different tasks. It provides with a luxury of being able to compare different approaches.