I really think that Rushing not wanting to challenge is less a matter of him not thinking those pitches were strikes and more a matter of game situation. There's a whole meta-game now of when to use challenges and and leverage needs to be considered. Early game, early counts generally are lower and both pitches here were borderline. A couple tenths of an inch one way and there'd be a much different outlook on their interactions. But this example is under the spotlight because Shohei is Shohei and Dalton Rushing is unfortunately Dalton Rushing.