

Tolerance, inclusivity, and integration.
To put this into perspective, the legal fact that “everyone”[0] is welcome in a given public school was not established until 1954 with Brown v Board of Education. And segregationists lost there mind over this.
In 1957, president Eisenhower had the 101st airborne division invade Little Rock High School, after Arkansas deployed it’s national guard to block black students from entering.
[0] In terms of race. Restricting access to schools based on home address remains common, and has ended being used as a way to effectively segregate schools without violating Brown.
I’m don’t know any ultra-Orthodox but do have several friends/family that keep kosher, and all of them are satisfied with just keeping two sets of dishes (although some just have one set and are satisfied that washing them count).
The disposable dishes, cooking in foil, and such comes up when they visit someone like me who does not maintain a kosher kitchen (and even then, only one family actualy cares enough; but, as I said, they are not ultra Orthodox)