Ten years ago I talked to my son's high school math teacher and she said the Common Core curriculum was dumbing down students' math. She said colleges were complaining that they now have to require students to do remedial math upon entering college because Common Core is so bad. I had looked at my son's math over that year and figured Common Core math covers lots of material so shallow that it's quickly forgotten and no one gets mastery over any of it.
Lowering grades in the SF schools means colleges will have to pay attention and adjust their acceptance criteria from schools like this.
My sister worked in a doctor's office for a while and in walks in a top-10 of all time NBA player who went to a top-notch academic university and was the top player in the NCAA for several years. He had trouble filling out the standard form when you show up for a doctor appointment. She had to help him. She was surprised how illiterate he was.
Lowering school standards for athletes does a disservice to them. Lowering them for everyone in SF hurts everyone that goes to school there.