For more then a $1100 (256Gb model) smartphone with a technology used never before, I think its not that weird that there are consumers who have serious doubts, when it comes to FaceID.
New owners will be testbunnies for Apple, expensive testbunnies.
Again, you just have only 14 days to adjust to the complete new gestures, huge notch, FaceID and other new stuff.
Let's say you couldnt adjust after 24 days, then there you go....no way Apple will give you a 100% refund. You could sell the X yourself and loose a few hundred euro/usd/gbp
Some people are okay with everything (any product) Apple throws at them for almost any price, and some other people are very critical for a smartphone priced at $1000/€1359 (a price never seen before with any smartphone)
I don't see it as that complicated. Technology moves forward, there will always be new features/tech being added to our devices. In this case, the technology seems to be expensive to manufacture at a large scale, so prices are driven up. Apple isn't forcing anyone to buy this product and if you don't like Face ID, the notch, or the new gestures, then you shouldn't buy one and become one of their "test bunnies." You can't fault them for releasing the tech though, right? Or pricing it higher considering their costs are higher (apparently margins are smaller here than the 7). They are a business, that's it. Take it or leave it.