We've already gone through this, haven't we?
Certain private employers (providing employer subsidies for employee health insurance) decided it was in "their corporate best interest" to have uber-healthy workers that didn't add cost or liability (via higher premiums to insure risk behavior, as insurance actuarials dictate).
Where the hell have you been? Obviously not applying for employment at any large corporation that wants to reduce their "overhead employee costs". Translation: by signing this employment contract and participating in our employer-health insurance, you hereby agree to modify your lifestyle behavior, and risk assessment, as hereby defined by our insurance carrier: XYZ
There are also privately owned apartments/townhouses/condos that can "ban" smokers, pet owners, minor children, and even any kind of public flags. Doesn't matter if your original contract didn't specify these things; any new property owner can void the original contract and re-write a new one, because they are the real property owners.