Is it a lack of social responsibility to not care about current affairs and social hot topics?

No.

Many people just pretend to care about current affairs

Many people's "concern about current affairs" actually means taking sides in the Weibo comment area and Zhihu answer area, making bad jokes and telling Soviet jokes. Betrayal with people who disagree with you. As for their opinions on policies or events, it goes without saying that they can't explain why. If you don’t believe me, send them a set of test questions from the national and provincial exams and see how many points they can get in the current affairs section.

If this counts as "caring about current affairs", I would rather be a person who they say is "not concerned about current affairs", "indifferent" and "lack of social responsibility".

So, in many cases, it’s not that they don’t care about current affairs, but that they are neither willing to be the marionette of the platform, nor are they willing to waste time in endless meaningless lines and arguments.

Don’t judge anyone for not caring about current affairs. Social hot topics are not a sign of lack of social responsibility. Everyone has freedom. I hope my answer will be helpful to you!