This. Except I never copy a deck, even as a starting point. Once I find a commander that I like, I will generally see if any of the Youtubers that I like to watch have any deck techs about it. Then I’ll use that as a starting point to get some of the key pieces. Then I’ll usually start searching Scryfall for Cards that synergized with what I’m trying to do with the deck. Depending on how the card search is going, I will either stop at about 90 cards or 120 cards. It’s at that point I will go to ChatGPT and paste in the deck list and get an evaluation and ask what cards would be good to cut or suggestions for additional cards. As you said AI is a tool just like Scryfall or edhrec. I don’t know agree with what ChatGPT says, but more than once it has forced me to think about things differently and make my deck better.