Definitely, it's one of those technologies that needs to be dumb and reliable because of how life and death it's use is.
Like if you need to use your gun, you probably need to in a hurry. What if you have grease or dirt on your hands when you need to scan your finger?
There's already bio-metric safes if one wants it, and you're almost always going to need a gun safe anyways if you own a firearm.