It's more dangerous than you'd think. If you apparate you run the risk of splinching if you don't do it properly - which is the possibility of leaving bodyparts behind, from a piece of your eyebrow to an entire arm. It takes a lot of concentration to perform without hurting yourself.

[ Splinching in the Drabworld might not be too terrible, but she'd rather avoid it. ]

Flooing is generally safer, but if you're not careful about your pronunciation you could end up anywhere.