well, to me this widespread disapproval for using ai to write a majority of your code seems odd. AI mostly seems like just another tool in our toolbox albeit with its own pros and cons. The pros are that you can rapidly develop stuff and the cons that it's not precise and sometimes it creates deep bugs that are nearly impossible for you to manually debug.
You might look at this from another angle, which is that the use of AI doesn't capture the spirit of game jams, which are testing our skills to program games "manually" (ignoring the ways in which modern programming has become way less manual than in the past due to engines and libraries doing a lot of the heavy lifting). I think this is the only argument that works for trying to justify bans on ai coding in these contexts. But even here, I disagree with the motivation. Imo the competition should be about making good games and the tool used is irrelevant. Look at robotics competitions for comparison. Do robotics competitions become degraded when competitors put advanced modern computers in their machines? No, they become more interesting. You might say that doing so is inauthentic to the competition which is testing the competitors ability to do electrical/mechanical engineering.
I'd be curious to hear peoples reasons why they disapprove of using ai to write the majority of their code for game jams.