First off Rosario is a free agent after next season and we have a ton of guys who are near MLB ready that can replace him like Freeman...
So on paper, moving Rosario for a need (aka a lefty bullpen arm) or going with a mix of 21+ draftees/signees will free up the spot for the guy who is a long term piece, which on paper Rosario isn't...
Now that being stated, I understand where you are coming from. Rosario has become a leader for this young roster so I don't blame some people for wanting to keep him, maybe even extending him. Keeping him wouldn't hurt us on paper in 23...
I will be sincere, it's a high probability we will trade him, but if there isn't a good offer, we will keep him. We aren't going to get rid of him for nothing though, so whatever move we make, it will help the team in some fashion, whether or not he is on or not on the roster.