Nobody today can memorize an epic like the Illiad today like people routinely would in Socrates' day. It a bit impressive if you can reproduce a 3 minute song text from memory. The Illiad often took days to recite.
Sure you can argue that tools (like writing) allow us to do more, to store more information, but the point is that they also cut us off from doing other things. Recitation from memory is available even when there is no paper.
This has gotten a lot worse recently, with tools like Wikipedia acting like external memory for a lot of people, granting them access to a lot of extremely superficial knowledge they don't actually possess themselves. It is certainly faster to look something up than to learn it, but a huge part of the benefit in actually knowing various things is to be able to connect what you are seeing now with something you know from beforehand, to generate a conclusion. That only works if you know the thing, you're not helped by theoretically being able to look it up.
The same with auto completion. Sure you can type faster, but it also means you, as a human, become less capable because you've never needed to hone the skills necessary to program without it. Programming without autocompletion is available in any text editor, even on paper.
Using tools is fine, but being completely reliant on them even to perform basic tasks is hobbling yourself. You turned yourself into an idiot in a powerarmor: Completely useless without your training wheels, unable to reason, unable to perform even simple menial tasks. I have a hard time seeing how that's made you, the human, more capable.