Like I pointed out, there are not 300 inmates in that room. And of them, probably zero are in max security.
The 49ers have had Players visit San Quentin since 2000. Their flag football team is now the San Quentin 49ers, going along with the SQ Earthquakes (soccer), SQ Warriors and Sq Kings basketball, sq As and Giants etc. Google and Facebook sponsor code training labs. They have staff volunteers from UC Berkeley and Stanford teaching at their in prison accredited college, the first, and advising their inmate media, which were finalists for the Pulitzer. Professional chefs teach them how to cook restaurant meals with their donated ingredients.
Gavin Newsom is repurposing SQ into a ”rehabilitation center” due to all this community support. It goes a lot farther than heres my Celebrity appearance, you accepted Jesus, now go away.