Can a license to practice a profession be revoked because of a criminal conviction?

Finally, in Ready v. Grady (1966) 243 Cal.App.2d 113, 52 Cal.Rptr. 303, an insurance agent's license was revoked because of an expunged felony conviction. Relying on the foregoing decisions, the court of appeal upheld the revocation indicating "[i]t is now well settled that the suspension or revocation of a license to practice a profession is not a penalty or disability within the purview of section 1203.4 of the Penal Code." (Supra, at p. 116, 52 Cal.Rptr. 303.) The purpose of such revocation "is not the punishment of the licensee, but rather the protection of the public." (Ibid.)