He had the most rest, I assume. If you look around baseball, it's pretty split whether teams use their best pitchers or most rested starters coming out of the break.
Crochet has burned through so much service time and it seems very unlikely he'll ever become a starter. I'd imagine he has very minimal trade value at this point.
It's always the same story with Madrigal. Prorate his stats over ~140 games and he ends up looking quite valuable. But it doesn't seem like his body can hold up to being an every day player.
2/3s of the roster is dedicated to players who contribute nothing. Robert has more WAR than every other position player on the team combined. They're the Charlotte Knights without him.
Fixating on who pitches when or any decision on the margins is a total waste of time when the talent level is this abysmal.