The movie Stand and Deliver was made in 1988, Escalante lost his chairmanship in 1990 and left in 1991. So unless the producers had a time machine, there was no way to include that in the movie.
I wsan’t saying anything bad about the producers. We wouldn’t even know about this if it wasn’t for them. It’s just that the movie ultimately protrayed an America that doesn’t exist — one where one man can change the system and hope exists even for kids in the inner city. That was indeed the 1980’s. In the 1990’s and 2000’s, that man is demoted and leaves for Bolivia as this obituary informs us . . . and I saw the movie for the first time probably in the 2000’s on TV.