Back when I was a kid learning go, I was taught that the kick joseki (a standard sequence of moves, similar to chess opening) [1] is a bad move, and you were considered trolling (and the teacher would not be pleased) if you played a 3-3 invasion [2] during the opening phase. These are all vindicated thanks to the AI and played pretty commonly nowadays. AI definitely helped eliminate many dogma and myths in go.
3-3 invasion takes teritory at the expense of influence (future potential).
I think I improved a lot when I stopped 3-3ing (it opened up different style of game for me)
Noobies love 3-3 (I definitely did), because it’s kind of simple and familiar move. (Especially at the start of the game, when board is empty, there is gadzilion of possibilities and most of them unknown and possibly risky)
If not discouraging 3-3, I would still recommend starting without it, to learn that way of play (if for nothing else, to deal with 3-3 invasions)
Agreed. With a 3-3 you are trading away influence in favour of hard territory. AI is happy to do that very early because AI can effectively destroy influence. Human players need to learn to enter 3-3 at "the last possible moment". That requires judgement.
[1] https://senseis.xmp.net/?44PointLowApproach#toc6
[2] https://senseis.xmp.net/?33PointInvasion#toc2