Find me one example of Linus going after someone who was new and didn't know better than what they were doing and then I might concede his rants are unhelpful, but personally, the only times I've ever seen Linus go after someone was someone who supposedly should know much better than what they were doing.
And come on, everyone who's ever worked contract programming or IT work knows that you probably wish you could do the same with some of your clients.