Half joking, of course, but seriously I think this sort of design choice just reinforces the idea that the manufacturer, not the buyer, owns the product. Locking the hood closed, the symbolic innards of your car, isnt the only way to build a car safely. I fear moves like this will just further alienate people from the tech they rely on.
That said, luxury sports cars are an oddball market with non-obvious concerns and economics. A lot of the limited production run cars these restrictions apply to are essentially too valuable to actually drive. They're collectors' items, or acquired as speculative goods that will increase in value. It may be that making them more "tamper-proof" is in a strange way in the interest of the buyers.
I had read that the reason for the plastic covers on fancier cars, while partly for appearance and to discourage amateur servicing, also are there for a substantial reduction of engine noise. But I never heard anything about owners not having permission to remove them.
I've speculated that one reason for making it a hassle to service modern cars is that if an owner has been messing with their car, screwed it up, and brings it to the dealer, it's more likely there will be clues that warranty coverage should be denied.