Bo isn't going anywhere, but Espinal is a better SS.
Moreno, Kirk, Jansen have value to the Jays, but if a team offers up more value in trade to fill positions of need, you take it, right? So no, you don't start off by making one or two of the 3 catchers off limits.
Remember the Jays two WS was in large part prompted by trading fan favourite Crime Dog and Fernandez to SDP for Alomar and Carter. Nothing should be sacrosanct.