Earlier quoted context omitted.
They're not idiots, they just don't give a crap about waste until it affects their bottom line. (Most humans seem to operate on this principle) A lot of the business-related bullshit is a response to advertising and sales. But a lot is also lazy tech people slapping pieces together until it does a thing, and they don't care that it loads 100x more data than it needs to, because again, doesn't affect their bottom line…
Why would they care, they have to do the work of 5 in the time of one because there's now off the shelf solutions for everything. Too bad if those solutions often come bloated and incorrectly configured, maybe they should hire more engineers. Some business prioritize loading speeds but big ones with brand reputation won't care, they have little to lose.
If the argument is "nobody will do anything about it because nobody cares," isn't the best response"then start caring!"
I'll see if I can find some old articles I used to love about how something called something along the lines of "concerned Christians of America" basically determined what could be on television for ages because they maintained a letter-writing force of a mere five thousand people. Nobody else was kicking up that level of shit storm, so the networks listened to them.