Did you just argue it would be harder to find a backup catcher than a right fielder? And try to remove all actual baseball ability from the argument?
The entire argument about risking/replacing Betts does hinge on him being Mookie Betts, a current MVP candidate. A Gold Glove winner. An elite all around player. Swihart is none of those things.
If the Sox were offered a player and the dealing team said “we’ll take either Betts or Swihart. Your call,” would you really consider how much “potential” Swihart had?
Right now Swihart is a backup catcher trying to seize an opportunity. In that respect, he’s basically Tyler Flowers or Devin Mesoraco or JR Murphy. Sure he might step up and succeed, but will he ever be an MVP candidate?