I can't even begin to think about how a laptop screen upgrade would go. Who's manufacturing them? How do I get just one? How do I make sure I don't spend a month waiting for shipping and get a fake? How do I make sure the housing is going to fit right? How do I make sure the pin outs match?
... and etc etc. An official upgrade pathway eliminates all of that. Sure, it's not bringing you back to "average person", but Framework have been super clear that's not who they're after. They want people in my bracket. To be honest, as a cohort, we've proven we're willing to (over)pay for this kind of thing, too. It's why the PC Market still exists despite graphics cards being overpriced by about double.