American expat in UK here. I'm very reluctant to ever move back with the kids.
The PP suggesting that children are traumatised by active shooter drills in school is probably correct. A family friend is a preschool teacher and she has had to do these drills with 3-4 year olds. They practice hiding in the closet and being very, very quiet so that the bad man can't find them.
According to my source, these kids cannot ever be told that it's only a drill. Because they are routine drills that happen as regularly as fire drills. And if an active shooter situation happens for real by the time these kids are aged 11-12, they won't take the alarms seriously and will gab, or play with their phones, or make noise and compromise their own safety.
There is no political appetite to fix this. None. Look up the video that a Texas newspaper put together with the words, "the sound of children screaming has been edited out". People know how vicious and destructive the gun situation has become. They know that an AR-15 obliterates internal organs. And they still double down.
Then there are people who get on the news and say that the surviving children and parents are paid actors. And people believe these liars.
The police are armed. A lot of police operate under the assumption that people of color are a threat to their safety first, unless they prove otherwise. Even Trevor Noah has said he's been pulled over by police multiple times just because (he has a Daily Show bit about this on YouTube).
Health insurance running out is a real thing. Happened to my mom's cousin, and he died of cancer because insurance stopped covering his treatment. I have friends with highly paid professional jobs who have been billed thousands of dollars for stitches. Excess fees on health insurance can be incredibly high. The ambulance will probably come quicker compared with the UK today, but the ambulance is private and you will be billed for its cost.
Look up the schools in the area you're thinking of settling in. Do you have to pay fees to enroll your kids in anything? Some high schools charge pupils a fee per elective and per Advanced Placement class.
The USA I would settle my kids in was pre-Brady expiration America.