I've gotten 2 good jobs directly or indirectly from LinkedIn. I would argue LinkedIn is probably the one site that you absolutely need to be on.
I dont engage with the platform, I don't post, I won't connect with recruiters, and yet still... they find you, and inmail you. It's usually local jobs with humane commutes and decent pay.
By contrast, I've never gotten a single interview for an application submitted via linkedin, and I've put out hundreds.
So LinkedIn approximates (lots of people), not just (people hoping to get hired). If you're hiring, the former is a more talented pool to hire from.