The BoS doesn't care about Muni. They don't use it. WTF do they care if grandma has to take 3 buses to the grocery store? https://twitter.com/skip_sf/status/1279131768730206208
The "leftists"
on the BoS mostly drive to work, making use of taxpayer-subsidized parking, and can't possibly relate on a personal level to what these cuts mean for the 700,000 people who rely on this system every day.

Now to be fair, some of these Supervisors probably drive Priuses, which obviously grant them full Moral Authoritah to hijack SFMTA for purposes of populist bloviating about fares.
Never mind the wishes of actual people, who rank better service, not lower fares, among their top priorities. Cost of fares doesn't even rank at all in the top barriers to Muni use.
https://www.sfmta.com/sites/default/files/reports-and-documents/2018/12/12-18-18_item_11_2018_muni_rider_survey_-_slide_presentation.pdf
https://www.sfmta.com/sites/default/files/reports-and-documents/2018/12/12-18-18_item_11_2018_muni_rider_survey_-_slide_presentation.pdf