At least here we don't continually make crap up that viewers automatically believe as gospel -- mainly, because there are several stat checkers ready to immediately disprove any kind of false data-driven decisions. We're all allowed opinions regarding issues like the bullpen, but facts are facts, and no one really knows if Whitlock's best role is as closer.
We do know that the Red Sox were a first-place team through the first half of 2021 with Whitlock as a set-up man and Barnes as an All-Star closer... In '21, Whitlock's ERA in the 8th inning was 0.56, while in the 9th it was 2.89. For OPS allowed: .544 in the 8th vs. .797 in the 9th. Then again, he was also better in the 6th inning than he was in the 7th (source: bb-ref splits).
Moon's long post is right on about the Red Sox needing to recruit defined pen men for at least the 7th, 8th and 9th... which even pitching coach Dave Bush recently agreed was ideal (hint to roster-building CBOs).