GP didn't say that law is not a profession, but rather that computer programming is not a profession. This is obviously the case, since there are neither educational requirements nor state-approved certifications for this work. There are ethical expectations, only because all humans have ethical expectations.

IANAL but one could certainly imagine 1A challenges to any attempt to enlist the state in the enforcement of a cartel like that of the lawyers or the physicians. In that sense it's no more likely that programming would ever become a profession than e.g. that writing would become a profession.