Yeah they're basically an entrepreneur looking to earn a stable salary versus being a speculator of the markets as their no.1 gig. But how is that different to all the people who provide 'lessons' or 'subscriber services' where they likely earn more on the subscriptions than they do from trading? How is that different to brokers or market makers and other middle men, or financial media, that basically leverage association to the financial sector, but earn money on the side outside of speculating in the markets themselves.
A lot of people "in the financial sector" earn money via other means than directly speculating in the market. Newsletter sellers, subscription/system sellers, brokers, data/software providers, financial media, financial related websites and services, etc. They're like the hotdog stands outside a carnival. It's not the main attraction but they're making money being close enough to it.