This is acceptable as long as people keep in mind Touch ID is not a security feature it is a convienence feature.
That's just flat out wrong.
All I have to say here is if you live in the USA, refresh yourself on the 4th and 5th Amendments to the US Constitution, then revisit that 'security feature'.
Keep in mind that while you can not be forced to give the authorities your password (violation of the 5th Amendment's protection against self incrimination), you can be obligated to give the authorities your fingerprint, and per the 4th, a warrant can be served to you, forcing you to submit your fingerprint, especially for unlocking your phone.
And if your Mac is protected by this variant of TouchID, by extension, the authorities could force you to unlock your Mac via unlocking your iPhone.
Yes, I know that this is a bit tricky as the warrant would be for unlocking your Mac and not your iPhone, but if separate warrants were served for that, you could be forced to unlock your Mac and have your data searched through by the authorities.
As much as I love TouchID (I use both it and alphanumeric passwords), I can see a slippery slope here.
BL.