Agree 100%Thanks for reminding why I don't like Acer. They don't trust the user, and that reflects in how they have implemented UEFI.
If you want, you can certainly use a password to protect the BIOS/UEFI, but the MB maker should not make that decision for you. Just look at how many perfectly good laptops especially, are on sale at low prices because a previous user either forgot to unset the password, or forgot the password and are simply are dumping the laptop.
Setting up UEFI for a single boot Linux is very easy, and the UEFI menu (implementation) should never get in the way.