He did it with PC. He did it with Todd. He did it with Diane. He did it with Wanda. All these characters would’ve ditched his ass if he didn’t sweet talk them into sticking around just a little longer. Hollyhock would’ve recognized this and decided that the only outcome that would result from telling him in person was that he would sweet talk her into backtracking on her decision to leave him.
How would Hollyhock have recognized this though? She wasn’t around when he did all those things. Ghosting BoJack definitely wasn’t the only way for her to handle it, it’s just the way she chose (and of course, that was her prerogative). But it could have gone any number of ways.
A good churro made right should be absolutely heavenly.