They adhere to the laws to maintain their licensing to attract the consumers that demand that. As with now, customers pay a premium to have a certain standard certified for them, which benefits the service provider through higher incomes.

As I touched on a above, the thing about restricted markets is that price is able to rise artificially due to the unnaturally constrained supply. This ends up being a government subsidy; one that is disproportionally paid for by the poorest people. If you are already comfortable with subsidizing licensed businesses, why not continue to subsidize the marginal ones? Perhaps even in a way that is less impactful to the poorest people?