Every version control system has a way to overwrite a dirty (modified) work directory, so git is hardly any more dangerous than any other tool.
It also won't help you get back uncommitted files that you destroy with `rm`. No other tool does, either.
There are situations that reflog won't get you back from, but those situations are perfectly logical and appropriate exceptions.
Darcs does: if you "darcs revert" to erase your local unrecorded changes you can actually "darcs unrevert" and get them back later. I guess it's a little like "git stash" but not quite, as you can only have 1 saved state and many darcs operations will nuke the unrevert save (loudly and with prompts, so it won't catch you off guard).