It’s kind of like your employer wanting a key to your car when it’s in the company lot, or to check your coat pockets when you leave work, or requiring a vial of your blood.
Some would say that I am privileged to say “nope!” to all of the above, but tacitly requiring employees to bring their own devices and then controlling them with MDM is such an inappropriate use of power that we should be protected from it, by right.