> We should be vaccinating kids against all of them rather than sending them to Chickenpox parties.
We do in the US. I was kind of surprised when my now 2 and 4 year olds were vaccinated against Chickenpox, since I remember doing the Chickenpox party thing myself when I was younger (staying home with some friends over, playing Daytona USA on my Sega Saturn, I think?).
Don't forget the one or two cool circular chickenpox scars that you might still have today.
It was like a badge of honor.
> We do in the US
For now. The current administration is chipping away at child vaccines, just today removing Hep B vaccine from the recommendations list. AFAICT you can still choose to get it for your kid, and insurance should still cover it, but I won't be the least bit surprised if before 2028 some of these vaccines are actually banned outright.