This may be correct, but:
1) I wouldn't want to risk it.
2) Almost every disposable shave would give me some in-growns.
3) Since I come from a beard-happy culture, it's not necessary. If I can get an equivalent to or better shave than my Philishave, I'll be alright. It's always been good enough to make me look decent until the end of the shift.
Therefore, I'll err on the side of caution. It's kind of embarassing though. I'm the guy who did 15km hikes through the Rockies with a backpack full of water samples, held my own in sparring with black belts from various disciplines, participated in sports with a broken leg, got attacked by 7 guys and stayed on my feet (which is more than could be said for 3 of them) but I've got sensitive skin.. Boo hoo lol.