If this whole full stack thing came from a massive capitalist exploitation scheme, then why was JavaScript gonna be the chosen language for everything? There we

If this whole full stack thing came from a massive capitalist exploitation scheme, then why was JavaScript gonna be the chosen language for everything? There were far more languages "spoken" by more people who were already involved in web development - the typical backend languages - and JavaScript wasn't a particularly popular language either. I do gotta say though that I don't have a better idea as to why things happened this way. I'm just guessing companies wanted to cut costs on frontend servers by only serving up static bundles and people hated page refreshes.