“If vaccinations are the golden ticket, what do you have to worry about? Your kids are vaccinated?”
No medication and no vaccination is 100% effective.
Thus, if one happens to be among the 1.5% of the population that is not protected by the measles vaccine, they will get the measles if exposed as will those who are not vaccinated.
If everyone is vaccinated or even if 95% are vaccinated, measles will not be able to spread, even if introduced.