Any reason why are sweaty smelly feet known to be healthy feet?

I don't think...: Sweaty smelly feet are necessarily known to be healthy feet. It will correlate with good blood circulation, but that doesn't mean they should also be smelly. That is usually caused by bacterial or fungal presence. You can get rid of that by spraying "clean sweep" (a solution produced by tetra medical) in your shoes. This is a nano-silver solution that sterilizes the shoes.

Baking soda: A little bicarb powder often stops this. You can also use antiperspirant such as certain-dri wipes. It always helps to change sox more often and to ventillate feet in the air when possible. Some people sweat more than others. Sometimes the shoes do not "breathe" well. Sometimes a person has fever or thyroid disorder. If you sweat too much in fl, go barefoot or move to alaska.