Why can't the hobby be legal?

Being of the libertarian bent, I have always advocated legalization of prostitution. That being said,, I am against government control, look at the DMV, Obamacare, Social Security, Medicare, etc. for mismanagement examples by the government. On licensing, look at the cost of a taxi license in New York City, thanks to government regulation. They stifle the free market. Finally taxes should not be "progressive;" taxes should be fair. EVERYBODY should pay something in taxes just to have skin in the game. Keep the government out of prostitution, it is a woman's choice.
I'd prefer the government keep its hands off any pussy I'm trying to score...hobby, legit, or hybrid.
I like it the way it is...in other words, the government isn't involved to fuck it up and stuff it in the ground with rules and regs. Government involvement would make it as boring as a daytime TV soap opera.

There's a sexual excitement to meeting a hot woman for an illicit, discrete affair.