While this is accurate (for "globo-gyms" like Anytime or PF, not gyms that actually having training components and charge $150-250/mo), that doesn't explain why it made its way into legislation. Legislators don't care about business models and let's be honest most of them aren't smart enough to understand it even if they did care.
It's not obvious unless you're more interested in scoring political points online than actually figuring it out. Gyms don't have a huge lobbying presence. I used to live in Pennsylvania and I used to work very close to the lobbying industry. Nobody from Planet Fitness or any fitness-related association is walking around the halls of the capitol twisting arms.
> Nobody from Planet Fitness or any fitness-related association is walking around the halls of the capitol twisting arms.
The CEO of Planet Fitness was a contributor to Trump's campaign fund in 2016. I think you're underestimating how politically connected these groups are.