> The land of the free, where the government decides what adults can with their own bodies.
I have found that such black-and-white sentiments are common here in the US, and surprisingly missing a lot of very importance nuance.
So... you will never use publicly funded (often emergency) healthcare? Do you really understand the risks that you are taking? Are you sure that the risks have been accurately and understandably explained? Are you sure that only adults will be targeted? Are you sure that commercial interests are not lying or exaggerating to you?
I remember analogous arguments in the late 70's / early 80's regarding the use of seat belts. "It's my body! I know the risks!"
It is the role of a functioning society to find a way to help protect its own members from non-obvious, long-term harm. We can argue if government regulation is the proper outlet, and we can argue about efficiency and details, but... no no sane world does a "I can damned well do whatever I want!" attitude build a safe, equitable society.