The thing is... the use of AI for writing has now become a trend for many people. There are people who can't even respond to a simple text without asking Grok or Chatgpt for answers.
I think this is why it is hard to believe someone wrote that word or sentences themselves because we are now in the AI world. It is believed that you can't write "very good" unless AI does it for you. It is just... I don't know, but not too cool, lol.