Why is that useless as opposed to what most of us do for work? I think you guys have a weird sense of how useful the average job is, or how much the average job contributes to society at large. At least this made a lot of money I guess.
You can create a lot of profit for your employer whilst contributing nothing to society or even be detrimental to it. Money has no bearing on that.
I think most jobs contribute positively to the society. Not much, for sure, but they contribute.
Is the cleaner regularly removing poop stains from the personal toilet of a big and rich Google shareholder more useful than the qualified Google engineer working hard so a big number is very slightly bigger on one the shareholder’s list of numbers? I think the cleaner has more impact.
Yeah this is no different from someone optimizing literally any other performance bottlenecks in ANY other web project.