Bohm never should have been demoted last year. It didn't make the team better. It didn't make Bohm better.
He also didn't get hurt last year - it was the COVID IL that took him out for two weeks right when he was showing signs of life. A month later he was in AAA.
Of course it's also possible refusing to get vaccinated soured the Phillies on him. They might accept that from a veteran (and would also have no choice) but his season was interrupted due to a choice he made, and that does not scream out "I will do anything to help the team."
In theory there should indeed be 3-4 starts a week for Bohm if you sit Didi and Segura twice a week (with Stott filling in for them). But they won't sit more than once a week, if that. And DH spots aren't really there for any of them.