It seems to me like a really good way of attaining a rounded development. The blending of tailoring, couture and what would be thought of as mass production ideas, probably makes people a lot more versatile than they might be if they were on a single-track route to skill development. I like the open-mindedness of pulling in ideas from all sources.
I don't know about what effect it has on depth, like e.g. some 75 year-old waistcoat maker on Savile Row who knows his way around his craft in his sleep, but then he only makes waistcoats and usually according to one perfected methodology.