Why is that more-severe-than-usual penalty necessarily bad? Looking at the hole on Google Maps, it seems the green is of a decent size and there is some room to miss left. That bunker may not look like the Road bunker or the Devil's A-hole, but if those bunkers wreak similar havoc as it sounds like this one does, with the only difference being its innocuous look, why are they okay and this one is not?
I agree with everyone who says playability is a virtue of golf courses, but I don't think I agree that one particular bunker where a plugged lie is significantly more likely than usual is necessarily a bad feature, or that the hole it protects is necessarily a bad hole. Just don't hit it there, or know that if you do commit that grave error, bogey is probably the best you're going to do.