Still, a less snarky reply would be that the benefit of a 1080p image is obvious while the benefit of half a megabyte of javascript (a guess) to display some simple text is dubious at best, even if it could be used to do something otherwise unthinkable. I feel like over the course of 20 years, accessing a website has always felt equally slow/fast. That's kinda weird, since it's not all high-res images and whatnot. Somehow even the text loads slow, even the static, non-cool text. The issue is probably that these things are designed for attention span (which is low but non-zero) so whatever half a second we have available to draw stuff on the screen before people click away, we feel the need to fill with useless junk for the sake of it.
I wonder what would happen if a few bigger websites would decide to design their frontpage in a way it loads in an instant on (nearly) every user's browser out there. So people get some contrast against sites that don't. Like, making no-split-second-lag a "feature". I wonder if it could catch on.