As Grabcopy has pointed out elsewhere, Andy does not yet move very well on the dirt. Because of this his timing on the ball is slightly off anyway. Therefore, it's not rocket science to think he's not as confident as he could be. In these circumstances, is anyone seriously doubting that witnessing a bad injury, that is taking Benneteau out for weeks, is not going to effect this confidence?
As for Nole, I like him very much and am sorry for his loss, but experiencing a death in the family, is not the same as thinking you're going to break your ankle in a pot hole at any moment.
One thing I'd like to mention in this connection, and that is Andy's bipartite patella (which tends to get forgotten about because he rarely mentions it). He has said though that clay is the surface which aggravates it most because of all the slipping and sliding around, and that certain sideways movements, particularly on clay, cause it to give him pain. As a result he's had to adapt more than most players to playing on that surface.
And I agree about Nole - a bereavement isn't going to put him out of the game for months, which a serious ankle injury most certainly would do. It could even end his career. Would we like that to happen?