I agree. This scenario is definitely something that a lot of Hive users are afraid of. We still have accounts that continuously watch out for AI created content and downvote them. For now, the use of downvoting is enough to fight against that scenario, and it is possible to trace the ownership and do actions against it as well.
That is why I think taking care of one's reputation is important. I think humans are social creatures, so I don't think content creation will or should truly disappear from Hive. Validating transactions and providing liquidity are important. Hive has a lot of potential applications and it can handle more than just these two.
Since Hive has a text based database, some are even hoping it can replace most of what are offered in Web2. We have the possibility of replacing Instagram, Twitter, YT, FB, etc. Actual ownership and the earnings can help do that.