Measles and varicella aren't really dangerous for kids, when I was a kid no one was vaccinated you would just get it and go through... As an adult it's dangerous...
I think people got more skeptical on vaccines since covid circus where "experts" and doctors said crap like "1 dose is enough" then "you need 2 dose and you are OK for 10 years" then "you need 1 dose per year" then "astrazeneca is safe and sure" then "no astrazeneca is for youths" then "no astrazeneca is for elders" then it got retired, "they don't cause problems" then "it can cause myocardial" and I can keep going