Third job was entirely through LinkedIn. found the job post there, found an old contact from college through there who gave me a referral, introduced to the recruiter through LinkedIn.
4th job is still up in the air, but I was approached for freelance work via LinkedIn in the meantime.
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You definitely don't need to play the networing game to get a job, especially not if you're in tech. But having a publicly viewable resume sitting there and an old contact book of information (which is less intimate than asking for a number or email) was valuable enough for the $0 I directly paid for it. I do get 80% spam and recruiters who clearly never read my profile, but thats unfortunately most of society these days, be it internet, phone, or snail mail.
In parallel, many LinkedIn "influencers" are spamming garbage. You just need to ignore it, similar to how you might ignore garbage accounts on Twitter.
I use LinkedIn only as a public profile/CV. I don't really browse or ever read anything there.