No. Using a search engine justs presents a list of possible locations for an answer. There us still the need to check and access if one or the other is a possible solution and choose which is the better one. There is an involved process. The LLMs spit out a prescribed solution, with an enforced by marketing and ignorance presupposition it is correct.

They did not. Anything that requires serious research still requires work. Anything simple or trivial became easy to check rather than relying on what the most confident person around you said.

They do not for the same reason libraries don't make people stupider.