No more ridiculous than when a disc is stuck in a bush 2' off the ground, pretending it's on the ground and taking a stance there.
Then again, unlike golf, we don't propel the disc from where it lies -- we pick up the disc, take a stance, and propel it from a point a few feet away, with our hands. Maybe, just maybe, we're not playing golf.
The fact that a small minority find it ridiculous, and some moral issue with the lie being vertical (it's the direction and distance you threw it and where it came to rest, not that it came to rest on the ground, that applies) doesn't make it a fact -- just makes it a minority opinion.
The 2-meterers persist in this circular logic: It's a penalty because you shouldn't throw into a tree, and you shouldn't throw into the tree because you might get a penalty.
Or insinuate that it's some sort of moral weakness, trying to avoid penalties, to people who play courses will all sorts of water and other OB and mandos, which dole out plenty of penalties, none of which the enlightened sky's-the-limiters are trying to weasel out of. We're just distinguishing between logical penalties, and illogical ones. We've heard the arguments, and some of us played years under both systems, and reach a conclusion.