My mam said “you eat two buckets of dirt in you life and don’t even know you’ve done it.
My kids when they were very young used to eat sand off the beaches in Cornwall while making sand castles, they used to get sand filled nappies but no ill effect.
I love today’s young mother chasing after their kids with disinfectant wipes especially on kitchen/dining room surfaces.
Kids will never develop a good immune system, maybe we were better off exposed to all the germs and did a lot more playing outside instead of in a stagnating atmosphere in the house.
Our homes were always sociabley clean and that’s all that mattered.