Yeah, that's just the problem. I think the take on Julien learning 1B is a solid one, but I think that's probably going to take some time. Remember the original plan was to have him learn one of the corner outfield spots, as that seemed to be the more immediate route to playing time.
Except we have a logjam there, too, which is the whole point of this topic. I wonder if the front office truly anticipated that Byron Buxton was going to be the everyday DH heading into May, or if it was more of a situation where the knee was barking around Opening Day, but they'd hoped it would clear up after a week or two and he could go back in the field. Because losing the option to DH guys like Larnach, Julien, and Kiriloff makes it significantly harder to get the young guys regular playing time. Julien is not going to "replace" Jorge Polanco. And, shockingly, Kepler just started 7 games in a row after coming back from injury, until he finally sat against a lefty (P. Corbin). (FWIW, Kepler's splits in 2022 were somewhat even, but he was trash against lefties in 2020 and 2021).
It's not just that guys like Kepler are bad. It's that when you bring a veteran back like that, they're so much harder to get out of the lineup when they inevitably slump. 400+ AB's this year from Larnach, Julien, or Kiriloff would be SO much more valuable than getting the same exact production from Kepler in their place.