I don't think requiring a professional license would result in these cameras being secure. The issue isn't individual developers, but market forces not rewarding making the investment to make software secure.
I could imagine things like (spitballing) requiring security audits for this kind of software or, say, assessing very large financial penalties in the event of security flaws being found, working -- those would incentivize the company to make a genuine effort to make their software secure.
I could imagine things like (spitballing) requiring security audits for this kind of software or, say, assessing very large financial penalties in the event of security flaws being found, working -- those would incentivize the company to make a genuine effort to make their software secure.