Apple had numbers a few years ago (2015?). It was something like 95% without passwords before TouchID and only 50% after TouchID.
I know people who consider TouchID too much of a hassle.
This doesn’t need to be a perfect solution, it just needs to be more secure than TouchID (claimed) and more secure than nothing (obviously) while being easy enough people won’t turn it off (we’ll see).
Consider the iPhone prior to TouchID. A lot of people used trivial passcodes, or no passcodes at all.