I dunno why the "thin-and-light" thing is so important to consumers.
Because at some point you are supposed to pick up and move the laptop.
But at some point, "thin-and-light" stops sounding like a reasonable concern, and more like an excuse to spend big bucks on laptops that can't do much. You tell me what the hell you can do with a Samsung Galaxy Chromebook. 1 kilogram (2.2 pounds) and 1 centimeter (0.39 inches) thick, sure, but at what cost?
But I suppose my wants are different. I want a desktop-like machine that just happens to be portable (for a stretched definition of "portable"). The people who go for these travel often (at least, pre-COVID). They like having a light machine to work with, and those ultra-thin-and-light laptops fit the bill. Which brings me to:
If you want many things and do not care about mobility, buy a tower, not a laptop. It is also easier to modify.
See, a tower would be too large for me to carry back and forth. Plus, there's the whole "bring your entire setup, including monitor, keyboard, and mouse" thing, which wouldn't have worked too well going to uni. So I went with a compromise, which is my gaming laptop. It's heavy as shit, but it gives me good-enough performance that I'm willing to put up with the sheer THICCness of this laptop. If I could, I'd go for a desktop-replacement machine, but those are well out of my budget. Someday, I'll buy one.