I believe that's called a small sample. You wanted to bench/move down Schwarber early in the season too (and he may actually be the coldest guy on the team right now so maybe they should again! There's no right or wrong answer, sticking with a guy is good, moving them around is good, sometimes a benching is good. But even if recently hot, the 7-9 hitters are not so spectacular that Castellanos's pedigree - and the Phillies' need to keep playing him in hopes of it finally turns - doesn't also count.
The real fix to all of this is Segura and Harper of course.