It’s worth fixing for sure, but between that and PCB flexing, to me the latter is by far the worse of the two. A lot of users will never encounter the first, but in a laptop with a flexy chassis practically everyone will end up flexing their mainboard unless the laptop is permanently desk-bound.
I'd put the spotlight on the repair prices to fix a MacBook screen: a full replacement will cost more that half the machine price, and basically the same as a motherboard replacement for low-middle range models.
It's akin to asking if you prefer to lose your right or left arm.
Apple would get out of that issue altogether if they gave up on the ultrathin screen. Again, the iPad doesn't have this issue for instance.