And that's just a result of growth. There are more humans than ever, communication technologies are improving a lot every decade, writing tools are also improving a lot, and now there are LLMs that can aid with writing. The more accessible it becomes, the more stuff we'll have out there, and most of this stuff is going to be not so great (we'll still have gems, of course). So, it was bound to happen.

The issue you're seeing ($platform spamwrite) is not really an "AI" problem (though, of course, any tech improvement is a sort of an enabler) - its root cause is modern advertising being not aligned with your interests. Incentives there are purely economical (driving sales is the only thing that matters there), and they don't have anything to do with the quality or consumer satisfaction, at least not directly. So, no surprise, when all that matters is consumers' attention (and not the quality of the work), people try to make buck by making the least necessary amount of effort and spamming hard, hoping for an "engagement".