What does this have to do with hackers? Good question, since I understand that hacking just pertains to programming. I must of been thinking of "solving hard problems" was for some other term.
Licensing boards and organizations for medical care and legal advice are well funded and smart. These are not exactly the organizations you want to be up against as a startup. Taxi commissions are trivial adversaries in comparison.
If you want to solve hard problems that involve changing legislation, then you need to be on the other side of the country in Washington D.C. YCombinator and other accelarators, incubators and tech investors are hardly equipped and networked to help a startup in the policy arena succeed. It's simply a bad investment.