This. I’ve watched too many people I care about suffer horribly and die prematurely from largely preventable illnesses. My own health went to hell from some genetic predispositions until I worked out I could absolutely not tolerate a standard American diet. Obviously some people can get away with it more than others for longer. But that’s not me. Found I wanted more life and a better quality of life. Fortunately I had the resources to change my diet and lifestyle. I realize that is a luxury not available to everyone.
Kefir is also an option. It incubates at room temperature. Just need a scoby, container and milk.