I also don't see many teams with great catchers and I don't think it's our highest priority.
"Highest" is relative. The reason I think it is our highest priority is that I don't see any other critical needs; with Taylor (hopefully) reaching his potential and Eaton back, Wieters will be the only hole in the lineup, and a gaping hole at that.
Some people think we need another starter. I don't (at least, it isn't a critical need). We won 97 with the rotation we have, and you can win the NLDS with two good pitchers; we need to win the NLDS to call it a successful season, for next year if we get that far I'll be satisfied.
Some think we need relief help. I don't. We have 4 sparkling relievers, and additional relievers always seem to be easy to pick up during the season.
So that's why I think it is the highest priority. Because I don't see a higher one. What do you think is a higher priority?