12 A was something I expected, but I think, if kids are a bit familiar with mentally/physically challenged people, that could also be a movie for younger ones... a lot depends on the mindset/knowledge of people.
To me, it is obvious that Aamir wants to give a certain message...first with TZP, then with LSC and now with SZP. This time, he ensured a looooong promotion run (which wasn't necessary in 2007 and impossible in 2022) and his 60-year anniversary was a good opportunity to make himself a quite public figure.
May his endeavour comes to fruition. 

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