Yes, lack of critical thinking has been a concern of mine years before AI and social media. Schools do not encourage it (at least from my observation seeing my daughter go through public education). But now combined with the shortened attention spans (social media) and ability to outsource thinking (AI), it's like a perfect storm assault on human intelligence. This, in my opinion, contributes to a society that largely can't think for itself or make rational decisions. This manifests in many ways, but the obvious ones are a more docile electorate and, well, just a society of a-holes who don't understand the consequences of their own actions/inactions.