Yes, and wooden and iron wheels have been used even earlier!
I live fine adding air once every 3 weeks.
If you have time and money to test out new technologies, I wholeheartedly recommend that you go for it. Don't push though onto it a person who is not looking for new problems.
Indeed, the flat possibility is a serious liability for wheelbarrows, given how they are used. However, then there are wheelbarrows with iron wheels as well, because of that.
So what about cars, are shops stocking airless tires for them? Since they require less pressure than bikes, it should be easier to go with foam for them.
I think your posting speaks for its self. I trust the OP and other members to see that you must have far bigger problems than flat tyres! Best wishes.