I would have assumed that techies would include technical people of all stripes, and if so, then I think you can see that people working on clean energy technologies and biological technologies are generally making the world a better place, at least for humans. The people making it cheaper to get into space, like SpaceX could also be defined this way.
If you are defining techies as programmers, then people here have posted examples of programs that are not trivial, and of course that's a minority.
It seems like an unfair standard though, why aren't you complaining that most authors write books you don't consider important, or most movies are trivial rewrites and extensions of nonsense franchises? Not everything has to be altruistic and highbrow. There is enough to choose from.