His bio says he started working in his father's bakery as a teenager, so he probably never went to cooking school, but he's worked in hotel bakeries around Europe.
I've got one of his books, his recipes tend to be pretty complicated, something I'd expect of a high end hotel baker.
I know how to hold a knife, I just can't hold it as tightly as I used to due to arthritis, so I wind up putting my finger on the top of the blade at times, too. I think it gives you slightly better control at the expense of speed.
And bakers don't use knives as much as chefs do.