I think it’s fair to say that a criminal discovering a bloke named David Swallow (for example) living on the coast makes $800k a year, would make the player more vulnerable.
If a criminal wanted to target a kidnap for ransom victim, they could go to the websites of top 100 ASX listed companies, read the remuneration details in the annual reports, and identify literally hundreds of people who were paid more than the top AFL footballer.
Those people would also have far greater accumulated wealth than almost any footballer, and be much less trouble physically to kidnap and restrain than an elite athlete.