What does 'recent' mean, since you have already acknowledged that temporal recency is irrelevant? When am I traveling? What's accurate to my current appearance? What if I started a cancer treatment that renders me unable to grow a beard?
Your flippant reply ignores reality, and these aren't even edge cases.
The frequency of your grooming habits AFTER receiving a passport are irrelevant to the actual approval of a passport. This doesn't need to be hard.
To what ridiculous extent do you take that, though? You must be wearing the same clothes? You must be made-up in the exact same way? I think it's pretty clear that the test should be "is it obvious that the person in the photo is the same as the person in front of you" and somebody with a beard does look like themself, even when they shave that beard.
Of course, this raises other interesting questions: is it OK for you to use a photo of your identical twin?