You can be compelled to provide fingerprints based on a warrant; I'm unsurprised (and not particularly bothered) that you can be compelled to use them on your own device. If you care about security, don't use a fingerprint alone; at most, only use it as a second factor for two-factor authentication. More generally, don't use anything that removes your ability to make a choice under duress, in whichever direction you…
You've described the state of the law as it is, but surely that doesn't address the issue of the law as it should be. I think that it is possible to be an intelligent but non-technical person and (EDIT: forgot the word 'not') realise that, all technical issues aside, the "something you know" and "something you have" parts of a password are on completely different legal footing; and I think that it is reasonable even…
There is a trend to use biometrics in place of passwords, which is a convenience feature which compromises security, even though it is often misrepresented as a security feature. (Using biometrics as a second factor helps security, but there is a big difference between "and" and "or" security measures.)