April counts but so do all the other months. Five months count five times more than one month. When a player is injured or making adjustments and then seems to emerge from it, that still means something, whether as an explanation for why a player was bad (be it Nick in April or Bohm in September) or an indication that they worked past it and found a much more acceptable baseline. For Nick, offensively, he did.
And I don't really mean to compare him and Bohm head to head so often but they are the only RHB starters we have who also don't play more important defensive positions (or are good defensively at all). Bohm has never looked like a player who should ever face RHP before last season and he was only 96 WRC+ against them after May 1 last year. Nick was 108 WRC+.
It just seems logical to me, and a lot more than a cherry-pick, to think that Nick can continue to hit the way he did for five months last season, especially given he's been a proven hitter his whole career, than to think Bohm, even with the advantage of youth, can do what he did for one month last year when he's never put together a single elite season in his career (and ended what was still his best one being benched in the playoffs).
I hope both things are true, and that a healthy Bohm who's making adjustments can can still be an offensive weapon. They both are also players who confound sabermetrics slightly; I will say Bohm's ability with RISP seems to be more consistent and repeatable than Nick's, but they both have a flare for it, and they are both BA-driven hitters. Bohm's a better overall hitter; Nick has more power.
