He has the footballing knowledge for sure and also he is academic. He left Arsenal financially in a much better position than most clubs. People try to make him a moron but during the majority of periods his Arsenal played very good football and with all the expenditure on the new stadium etc, he did a very good job on the financial side too.
He has a degree in engineering and a masters in economics I think so probably is a lot more qualified than the pundits in how to run a football club and balance his books at the same time.