Like I said, i had a legit linkedin account before i closed it and it never felt like it did anything for me. I have changed plenty about my process, from cv iterations and reviews, ai assistance to cater to job posts in cv and cover letters, etc. Of course i think all the information is great, but i also have first hand knowledge and experience. If you think all that's missing is a furnished LinkedIn account then i can tell you that it isn't accurate - in my experience.

LLM-driven application sites were not a thing in 2022 (used by both real humans and scammers).

to put it bluntly, the game has changed. what you knew from before is not correct now. if you keep applying your previous intuition and experience to a job search in todays market, you are going to be in for a hard time.