A fingerprint lock is way more secure than no lock.
It's either in my pocket or in my hand, and I never ever put it down in public. If get mugged (god forbid.. and do people still mug other people for phones these days?) there's nothing mega personal on it, and I can remote erase it pretty quickly.
Perhaps we can see more customization as to what biometrics unlock and what they don't?
This would be a very welcome feature but considering how the secret stores work at this point it is not likely to see this any time soon.
Sidenote: The false positive rate on any biometrics is way higher than you think (it is highly disadvantageous to be black unfortunately, yes biometrics are racist). People usually consider the near bound (e.g. small sample size, high differentiation unless you have twin) of the people around them as proof it is impossible but this has been problem a fallacy in even mediocre sized studies.
It still works but I would really like to see your suggestion to make sure real secrets are properly stored/safe.
That's a weird definition of "secrets". Mails may contain secrets. Pictures may contain secrets. Messenger posts may contain secrets (cf. all the leaks of chatlogs).
If I remove all apps from the homescreen that may contain secrets, that leaves me with the flashlight and Candy Crush.
All you need is a camera over your shoulder and you don't even need to observe the key-presses as generally the current character is displayed on screen. You could likely observe 100s or 1000s of them a day with an overhead camera at transit stations and the like.
The same thing goes for "Tap And Go" contact less payments not requiring a PIN number under $100.
Everyone goes on about how people can run up a few hundred dollars at different stores with your card if they steal it. But consider exposing your pin to surveillance during most common transactions which then also lets you remove cash from an ATM with that card if stolen which is much harder to recover and is also much higher value than the generally $30-$100 limit for transactions without a PIN.
Next minute you'll freak out when I tell you I can clone your house key from a photo of it hanging off your belt...
The general point is that security trade-offs are generally deeper than you might realise on the surface, especially at "public outrage" levels of observation which so frequently haunt the public mind in recent times.