me watching Buffy: “Enough with the crazy martial arts, lead with the god damn stake!”
The comics kind of address this:
Killing the holder of the Infinity Gauntlet usually results in someone equally bad picking it up.
So just killing Thanos often isn’t a complete solution, after the stones have been gathered.
It is suspension of disbelief, that somehow, there was only one practical solution to defeat Thanos. And they do not involve Thor going after his head, or Thanos educating the population of the universe about family planning and contraception.
ThanosWasRight is just a meme. Thanos could have gone for the latter option but his faux concern about overpopulation is a cover for his egomania.
I joke about Thanos being right cause i think we should be reducing the population but I don’t actually think killing half the world is a solution