"Just replace the motherboard" and lose all of your data on it. Yes, backups are important, but there's a loss of time when you have to restore from backup or provision a new machine/motherboard with your environment.

Not to mention that "just replace the motherboard" can often mean costing half, if not more, the original price of the machine. What happens if my SSD wears out? I just have to replace the entire logic board for one wear component?

Say it's not the SSD and it's something else like a voltage regulator. Now this motherboard is complete scrap. There's no harvesting of the RAM or SSD, so the part is probably $300 more expensive than it needs to be. And all those useful parts that are already scarce in a chip shortage will just be ground down and "recycled". These laptops suck.