Now with virus considerations, hotels want fewer human interactions.
I was staying at the Bellagio in Las Vegas, I could have done an "automated" check-in, which would generate a room key on my cellphone--seemed like a "great" feature;
EXCEPT should my cellphone battery become drained*, I would have NO access to my room.

*this has been known to happen

so?
what if you had a normal key and lost it? or it became demagnetized?
they arent forcing you to have smartphone key and done away with the front desk, have they?