I remember that story too, it’s horrible, but there is a good reason an administration which plans to fight police and army corruption would condemn an event where nearly a thousand students were killed. I don’t think they plan to leave small communities and students behind, or else why go build all of these vocational schools?
Your confusion is understandable as a mayor was murdered, coinciding with Sheinbaum’s victory
https://web.archive.org/www.cbsnews.com/news/mayor-killed-mexico-yolanda-sanchez-figueroa-after-claudia-sheinbaum-elected-president/