> and realistically more; most people don't have a sauna in their home
Most people have a sauna in their home, this is Finland.
Is this actual stat? Or do you mean “have access to” instead of actually “at their home” i.e. a private sauna they can use at any time 24/7, because from my lived experience I doubt the latter.
And those that don't have usually access to one in the building that they can use.
Or if they don't have that, can just go to one of the numerous public saunas.