Yes you can live without it. But you'll be missing you whole lot of jobs that are "linkedin only" in the form of posts, DMs and people spontaneously discovering your profile and reaching out.
Some people will be fine finding jobs without it, a lot won't be that fortunate.
I'm sure I'm missing a lot of job offers but I reply to a person who is afraid without it's as if they didn't exist. I can assure you it's not like that at all. I have no any problem finding new jobs, and new jobs finding me. I left my contact info with the recruitment agencies informing them they can contact me with the offers exceeding a certain rate. They regularly send me offers and sometimes I pick one. The system I adopted guarantees my pay only increases with time. Maybe I could be earning even more if I used LI, but I value my privacy a lot.
Sure, several of them, I could have found elsewhere, e.g. on a dedicated job board. But I wasn't at those other job boards, nor was the recruiter who brought them onto my radar.
If I had avoided LI, I would have missed out on some of my best gigs.
Some people will be fine finding jobs without it, a lot won't be that fortunate.