Although vociferous, you can't entirely disagree with brewers888 on the questionable logic at play. Over his last 866 PA vs. RHP (start of 2019), McCutchen has hit just .216/.309/.375/.685, .299 wOBA. While far from catastrophic, that's not great production for an everyday DH or corner OF. And yet, even with his extended absence due to Covid, he has the fourth most PA against RHP in the team. McCutchen has 118 PA, Hiura still has just 39.
Perhaps some of the blame goes to Stearns here, but I do think it is difficult to justify starting McCutchen regularly against RHP other than because of his contract/name. I get that we have a small bench, but it would even be better to give Jace Peterson starts at DH vs. RHP. (Since 2019, Peterson has a .313 wOBA vs. RHP.)