The big risk I always see with git is that you start storing more and more work locally. This exposes you to the chance of hardware failure on a desktop pc. With svn, it would be easier for the hardware to be redundant and backed-up.
[1] Not a substitute for real backups of your repo!
Admittedly, this is a bigger problem in svn if you aren't using branches for work-in-progress.
Just because the user has a risk of doing that doesn't reflect badly on the tool, though. It's like saying that the big risk of a knife is that you'll cut yourself if you're not careful.
Then again I usually felt safer if his work wasn't in source control anyway. I often thought it might be quicker to stay late and do the work myself from the start instead of staying late fixing his work as often as I needed to...