> Why is the primary tech people impulse to disrupt, destroy and harm other industries? Maybe that is why we dont produce useful tech anymore. The primary impulse is always hostile, rarely something like "lets create and sell a useful thing for them".

I think you misunderstand what disruption means in this context? Disruption means pursuing the same market as some incumbents, with the express goal of serving that market better/faster/more efficiently.

The impulse is hostile to the incumbents, but (in principle) good for the market: the market is getting competition, and competition is one way to make things cheaper/better/etc.

Obviously what this looks like varies by market, but the principle is very different from how you're presenting it