Same here. I think I have pretty much been to everywhere I ever intended to visit, including most countries in Europe and at least 10 countries in Africa, plus over 25 US states. Last thing I need is a "vaccine passport" at this late stage of my life.
Again, all that matters is you :)
To hell with the rest of the world, even the youth in your own family, is what you are saying.
More likely just a way to say where you’ve been.
Does it make you feel more important? :)