Previous technologies did lessen us in some way: agricultural and industrial revolution did lower the physical requirements to do most jobs. Writing tech lower the human memory requirements for knowledge acquisition. While we increased our output as a result of these technologies we have afforded ourselves the privilege of being physically weaker and having shorter memories as outsource that to the new technology of the day.

Fast forward to 202x, and the thing being outsourced to LLMs is our ability to think (to a certain extent). We should expect on average to see a decline in the ability to think critically by your average citizen.