Plenty of reasons.
Bautista can play some games at 1B and RF, shorter contract, smaller salary, he claims he has an excuse for being bad last year (vision problems), it would be a popular move with many fans, he’s never been one dimensional (a power hitter but also elite at drawing walks).
We shouldn’t do it because if we somehow dumped Morales on the Royals, Pearce would still be a better option than Bautista. 50/50 Bautista is done, but a team with space for a DH can give him a cheap 1 year deal with little risk. We’re just not that team.