Some might say that no one needs LinkedIn at all but there are some jobs that people struggle to attain so they get on LinkedIn. I have noticed though that I’ve mostly seen users who are in things like tech, marketing, business, and blue collar jobs on that platform. I didn’t see many people on there who work in medical professions but it could have just been a tailored experience for me. Are there career fields where you wouldn’t even think about making a LinkedIn?
I’ve never had a job where Linked In was useful beyond the company asking me to repost their junk. It’s mostly a place for upper management and executives to brag and feel special. Otherwise, it’s just marketing materials and spam from headhunters for short term contract jobs mostly and whose bots don’t really understand your experience and so the job hunting stuff isn’t even useful. I work in healthcare related tech.