Sometimes, that can be sound logic- like, I have my top-opening safe mounted to the floor in such a way that the lock faces a wall, with just enough room to get the key in- it would be difficult/not enough room to operate a pick and stuff....but with your lock, as long as there's a few inches between the ground and the lock, the thief doesn't need to lay on the ground. You can pick a lock by feel; even if you have eye-level access, you can't see what's going on inside anyway.

And forget the Bic pen thing! Real thieves use picks- whether actual picks, or home-made alternatives. No Master lock is going to thwart a real thief. A really good lock may slow him down or make him move to easier pickings [no pun intended!].