Because AoC has a leaderboard? Whenever you have a leaderboard of any kind, there will be people trying to get up there.
It's also likely that a lot of AI users will be skilled developers too. They already know they can solve the problems, they also think they deserve the leaderboard rankings, so using AI is ok.
It's also likely that a lot of AI users will be skilled developers too. They already know they can solve the problems, they also think they deserve the leaderboard rankings, so using AI is ok.