I converted a while ago, am significantly happier (and so is my skin). I've also managed to convert my wife to not shaving her legs - no more prickles, no more bumps, and waaay less wasted time and annoyance. She's much happier :)
That only works if you can't grow facial hair anyway.
No--a beard trimmer or electric razor does absolutely nothing for you if you can't grow facial hair. Thankfully, if you can't grow facial hair, shaving is pretty quick and easy and painfree.
If you can grow facial hair, though, a beard trimmer is absolutely fantastic for keeping your beard trimmed, which I presume was the joke.
Ah, see the joke now. Monday morning and all that. :-(
You still have to shave your neck to avoid looking like a slob.