I mean it makes sense. At this point for 2026 he's behind all of Steele, Shota, Boyd, Taillon, Horton, Brown and Assad. If they get a controllable pitcher here he's 9th on the depth chart.
I do think he's a good bet to hang around in the majors for a while as a 4th OFer, but to put him on the same level as Caissie and Ballesteros is just unjustifiable to me.
Alcantara has never really gotten the proper love here. The can play above average defense at a premium position. He doesn't need to put up an .850 OPS to be very valuable. You get a CFer who can put up a .240/.310/.440 line and that's probably a 3.5 to 4 fWAR guy.
Your thinking is that Arizona is going to ask for a guy in Rojas who stands a pretty good chance being a top 30 prospect in the game once after season lists come out, or a top 50 prospect in Wiggins? I suggest you go back and find the last time a rental bat was moved for a return like that.