Does it really save the day? 2FA
Of course it makes for a padded layer of security to an account but, that’s where it stops. It doesn’t stop a friend or some one within your circle from handling your device for few minutes with an intent to do harm from archiving an aim. It might be useful in distant situations with unknowns but that’s it. It doesn’t really save you from those that have access to your device.
Maybe your that cautious not to let anyone handle even your desktop or laptop device but, how much of a reality is that should you own such and login once in a while.

One thing is for sure, signed address is been suggested to be some permanent means and supposedly your active which I know OP is, it would only take hours or a few days to note your not in control of your account, you do the needful using signed address to try and recover it (haven’t had the need for this so I can’t say) but, you could always hope for the best of precautions in this signed address format has been put in place.