Not taking into account what he is there for, he has just done a very good job of regulating the internet. I would say his role was made quite a difference to the internet being regulated, wouldn't you?
Whether he understood the details of what he was doing is irrelevant, he did know he was regulating the internet.
He's regulating the use of the Internet in so far as it's use in the UK has to be compliant with UK law.
As it goes, English judges tend to be experts on English law, so this is probably the right decision, as far as the law goes.