Those are not laptops, those are iPads, which weren't modular to begin with. Also, not broken, but locked, because the previous owner didn't unlock them before discarding them. Are there millions of devices that get thrown away in general? Sure. But I doubt it's only devices with RAM that was soldered down and branded Apple.

Regarding spilling on keyboards: I don't know anyone personally who does that, in my local area people don't eat or drink next to their devices. I do have plenty of people I don't personally know that did ruin their computers that way and I have replaced plenty of Apple keyboards and entire topcases to solve it. Works fine as a side-business.

Repairing is not the same as upgrading, and recycling is not the same as throwing away, and neither is reusing. The difference is important, as the solution changes with the case.

Overall, this would be more fitting in a general discussion on environmental impact and not as much one about software, the hardware it runs on, and human behaviour. If you want to solve a big problem you need to generify instead of brand it as far as I know.

To dive in a little deeper: to 'fix' this, people need to spend less time on how beautiful their stuff is, or how cool they look, and go a more utilitarian route. But since the American economy is built around the opposite and the western European one has the tendency to follow it in some aspects that's unlikely to happy any time soon. Changing people is hard, it's also the best way to solve or fix or change anything.