I grew up in a super "dirty" household. Shoes in the house, dog, no house cleaners, the whole family did our own gardening and lawn care, etc. No allergies. In fact allergies were practically unheard of in that place and time.
Maybe single data points aren't useful for the discussion.
That's just a normal upbringing.
So are all of my siblings though, so there might be more of a genetic component to this.
While I believe some exposure helps build resistance ultimately your overall health will be influenced by stuff beyond your control AND your lifestyle/activities combined.
I always lived in very clean houses and no one of us ever went barefoot. (We did change shoes for slippers or equivalent rather quickly though).