The Importance of Foundations in Set Theory

As a kid in the 60s we used to be learning about intersections and Venn diagrams and unions right that was the beginning of set theory they were teaching at us. I don't remember it was second or third grade my parents didn't know why but it was I guess mathematicians of your type or others who thought kids should learn sets either before or at the same time that they're learning about arithmetic. Yeah most of what people study in set theory these days is really how infinite sets work because our intuition about infinite sets isn't as good as our intuition about finite sets.