@CCyrilS If you re-read my original reply to the OP, which perhaps you haven't, I agree with you and made many of the same argument that a refund/swap ability doesn't make sense.
My only complaint is CGs questionable release/rework cadence lately where they nullify expensive in-game resource expenditures shortly after they're completed.
For an average player who really liked Jedi but was struggling to utilize them, it probably took a good amount of time to save up the zeta to throw on the newly announced reworked GMY. A rework that was trumpeted across all their Game Changer members, etc etc. Flaunted here on these very forums as long-overdue and extensive.
... Then BAM.... Bastila.