Seems like an interesting upsell...
That is exactly what this is -- an upsell. Trezor has a number of other 'upsell' products, mostly that are marketed to help trezor customers keep their seed backups safe. IMO most of these upsell products are designed to help protect against the edge of the edge cases, and these edge cases could otherwise be protected against by keeping backups in multiple offsite locations.
I don't see the point of Privacy Glass Protector, IMO you shouldn't use hardware wallet when there's people nearby. Your privacy isn't protected if people nearby know about the hardware wallet or see your smartphone/monitor which used to manage your hardware wallet.
You cannot always avoid spending your coin when you are around other people. If you are limiting the instances in which you are willing to spend your coin to when you are alone in your bedroom, locked office or basement, you will miss out on many opportunities to spend your coin that other hodlers have.
Lol, this reminds me of when I bought a new truck: The salesman asked me if I want to add Paint Protection... WTF? Why the hell are they selling a $60k truck without automatically adding in a $300 feature that protects the $600 upgraded paint job? Did they think I wasn't going to buy the truck if it was priced at $60,300?
The profit a dealer makes on a $60k truck is several thousand dollars, probably in the 10%-20% range, depending on how much you negotiated the price down. The profit on a $300 paint protection is probably somewhere in the range of $295, or around 98%-99%. Dealerships may also sometimes give customers $100 off the price for some point they made in order to keep you in the office but would be making another $300 ($295) on the paint protection they sell you after you agree on a price for the truck.
