Except Professional Chess, taken to mean players earning a living solely from paid tournament play, is in the low hundreds? Thousands? Meanwhile there are over 20 million 'professional' software developers. There are many things about that single number demographic that I would argue against, but despite that I'm not sure there's ever been a market for any kind of 'professional chess player', yet there is for 'professional software developer' (for some definitions of 'professional' and 'software').

[1] https://evansdata.com/reports/viewRelease.php?reportID=9