This is more about low effort than AI.

It also seems like a natural result of all of the people challenging the usefulness of AI. It motivates people to show what they have done with it.

It stands to reason that the things that take less effort will arrive sooner, and be more numerous.

Much of that boringness, is people adjusting to what should be considered interesting to others. With a site like this, where user voting is supposed to facilitate visibility, I'm not even certain that the submitter should judge the worth of the submission to others. As long as they sincerely believe that what they have done might be of interest, it is perhaps sufficient. If people do not like it then it will be seen by few.

There is an increase in things demanding attention, and you could make the case that this dilutes the visibility such that better things do not get seen, but I think that is a problem of too many voices wishing to be heard. Judging them on their merits seems fairer than placing pressure on the ability to express. This exists across the internet in many forms. People want to be heard, but we can't listen to everyone. Discoverability is still the unsolved problem of the mass media age. Sites like HN and Reddit seem to be the least-worst solution so far. Much like Democracy vs Benevolent Dictatorship an incredibly diligent curator can provide a better experience, but at the cost of placing control somewhere and hoping for the best.