Handle9:
A license is something you apply for to do something you want to do. There is a clear element of choice. You are not required to have a drivers license. You can choose not to get one and not drive a car. You will (likely) not die if you can not drive a car.
A vaccine passport is quite different if it's a requirement to do things necessary to sustain life like go and buy food.
Things that are necessary to sustain life would not require you to be vaccinated, as there are people with legitimate reasons as to why they can't be vaccinated. (Basically just medical reasons, religious/conspiracy theorists need not apply)
Vaccine passports would likely be required for doing things like going to bars or large gatherings of people for recreation/conferences/etc.