My guess is that it's a joint venture between the two.... but that it makes sense that Hinch would like the idea of Willi Castro as well.
From the Hinch perspective, the love affair with Willi Castro makes a lot of sense when you remember the role that Marwin Gonzalez played on all those winning Houston teams he had in the late '10s.... at least at the time anyway, Marwin could get you a solid .700-.800 range OPS with very good defense at any number of positions.
At least in theory, Willi could be that guy.... except for the fact that he isn't good at defense and has generally been not good with the bat since the COVID 2020 year.