My opposition to AI, as with most new and untested technologies, isn't with the tech itself; that AI is inefficient and poorly understood is natural since it is a novelty, and like most technologies, it is reasonable to assume it will be better and more efficient in time. Rather, my opposition is with who uses it and how.
As it currently stands, AI is mostly another (poorly disguised) Trojan Horse meant to aid large corporations, information brokers, and government bureaucracies better track and predict human behavior so such can be more readily exploited. That AI, even in this early stage, can have socially and individually useful functions is apparent, e.g. it being used to aid doctors more quickly and reliably diagnose patients or help teachers dispense with drudgery so more time can be devoted to their students. But by and large, the people that most advocate for its expansion are the ones most likely to profit from it and most likely to use it in incredibly unethical ways.
This doesn't even touch on the fact that AI demands enormous resources. In my home state of West Virginia, our carpetbagger governor--to say nothing of most of our congress--quickly opened the door for AI companies to build data centers in the poorest regions of our state, despite heavy opposition from their constituents, both Democrat and Republican. One such data center is slated to be placed in Mingo county, one of the poorest counties not only in WV, but in the entire Union. This boondoggle promises few permanent jobs, demands massive water use and strain on an already strained grid, and will likely further destroy the surrounding environs. I could go on, but I think one gets the picture.
As for critical thinking, well, I touched on this before, but to give the Cliff Notes version of what I said earlier: it is a skill, but one that is innate. Like anyone born with a healthy body can throw a ball, so too can anyone with a healthy brain think critically. But the only ones who get good at either are those who practice doggedly, often with the help of others. As for AI encouraging a willingness to avoid thinking for oneself, I, too, share that concern, but fellas, that ship has long since sailed.