As almost everyone is vaccinated, not dating them seriously reduces your gene pool.
There's quite the substantial group that isn't vaccinated, at least here in The Netherlands.
I still pure too. I sometimes see men saying the same thing, "I am still natural and only want to date a woman who's natural" and saying they mean the shot.
And in essence it's a nice selection tool as people that aren't vaccinated likely have the same views and norms & values as you. So in that sense it could boil down to less sifting and sorting.
Personally also don't like to date someone that had lord knows what injected in him.
And many that did get it are now suffering from all kinds of weird ailments, sometimes serious. My ex husband is one of those. Nothing but trouble since the shot and he now wholeheartedly regrets having taken it.
Back to the point... it's a nice selection tool and totally understandable.
In a way I rather remain single than be with a man who's got that crap in him.