Thanks, but flexible plastic covers have also been widely used in electronics, namely in devices with capacitive touchscreens. And dents sometimes happened and that, while annoying, wasn't a huge deal, as the devices stayed functional. The problem here is how it seems to affect the remaining layers in the display structure. Again, there is no reason to believe Huawei isn't actually testing its product and making sure it endures daily usage, instead of rushing it to market like Samsung apparently did.
You appear to be making certain assumptions and the treating them as fact.
First you state flexible plastic covers have been used in "capacitative" screens. There's a world of difference between a plastic resistive screen which has some give and one which bends entirely. Second, you presume the Mate X screen is more durable when we have no evidence to confirm nor deny it. Neither the general public nor selected journalists have been allowed to touch it. Third, you presume the dents on the fold affected the structure - this is both plausible and understandable due to the soft nature of flexible plastics. One cannot foresee a solution to this beyond flexible glass. Fourth, you assert the fold has been "rushed to market" when the device has been in development for well over half a decade. Does putting a limited production device on the market at an exhorbitant price count as rushing?
The fold is not a mass market device. It's an exclusive, limited production device purely for those who can/choose to afford it and are willing to accept the potential risks associated. It's more of a Muira than a Corolla. I'd never buy it but that doesn't mean I'm not interested in it from a technological standpoint