but most of the people I voted for deserved that vote

That was the original idea. And in this way, the wheat was quickly separated from the chaff (exceptions always confirm the rule, of course).
I liked the system. This also seemed "unfair" at times. That's just life. But it was always fairer than voting EVERYONE (blindly) for EVERY crap...

I can no longer distinguish the stories from whether the author uses his own words or that they use Artificial intelligence (AI) to write the story.

This is becoming increasingly difficult... And this is exactly the reason - long before ChatGPT (automatic text generators have been around for ages, and have also been used diligently on the Steem so far) - why I mainly refer to my little bubble of "mother tongue". In this bubble, I can still judge quite well whether a text was written by a user himself (especially in comparison to previous works). And be it by the mistakes in spelling... ;-)