Maro is also taking into account draft chaff and random Commander filler, I imagine most of the actually popular UB cards will get reprints eventually. I'd expect it in a regular reprint set since I can't imagine there's that much demand for a solely UW set since a lot of the draw of these cards comes from the flavor of the original IP
What are players who don't like UB supposed to do when there are no Magic versions of those cards?
Just ignore them. They already release too many cards each year anyways, so it's not hard to skip them. Or play other games. Magic isn't worth your time or money if you're not enjoying it