Inception is kinda all about closure, which I'll give you isn't quite "social commentary" but its treading dangerously close to mental health commentary.

Interstellar is all about climate change, and the duty of humanity to fix their own mess, which are certainly social commentary points

Star Trek has social commentary and political commentary baked into its DNA, everything is an allegory for some real life issue they want to trick people into thinking about with an open mind, or from a new point of view

Star Wars, well, looking at when it came out the parallels to the Vietnam War are palpable but its dripping with anti-authoritarian messaging

Its funny, I was almost surprised to see Inception in your list. Not because I think its bad media, I think its pretty rad, but because it sort of feels more like a standard heist film with a science-y/fantasy-y gimmick. Certainly by my criteria it wouldn't count as SciFi for the aforementioned lack of social/political commentary, but its an interesting edge case.

For me, it's the totally unallegorical Starship Troopers.