To the extent there’s “devotion” here, I think it’s to Arroyo (the presumptive DFA casualty if Fitzgerald were called up), not to Arauz, who has options and is too young to jettison from the 40-man.A strong devotion to Arauz, et al. is being demonstrated. Whether it's excessive or irrational is the question.
Arroyo is hitting 232/326/557 since May 1 and was a useful major leaguer in 2021. It’s not crazy to think he’s a better option than a 28-year old guy who’s never had a major-league appearance, especially if the FO thinks there was some since-fixed mechanical problem or injury that accounts for Arroyo’s execrable April performance.
Moving Barnes to the 60-day IL would make room on the 40-man for all three but doesn’t seem to be in the cards for whatever reason.