There would be benefits to licensing web dev. I wouldn't suggest that a license should be required for any web development but if the website is used to safeguard PII or secure financial transactions then I don't think it would be too unreasonable to do so to get rid of these clowns. I used to work in an SMB web development shop and the incompetence that I'd see daily from our competition really changed my perspective on the field.
I used to feel almost like an imposter when I first started but I've seen so many "experts" who have been selling their services for decades yet they don't understand even the fundamentals of their profession. We already require licensing professionals for many things which are arguably less important than a lot of websites. I think a fair balance could be struck here to make sure that large businesses like Betfair can't get away with this crap yet not stifle hobbyists or businesses whose websites don't pose any appreciable risk.
