LinkedIn was changed over the years to promote users who write on the platform.

Not just about viewership - if you are applying to positions, LinkedIn gives preference to candidates who are more engaged ON the network (posts, likes, comments, Pulse) over lurkers. [1]

So this is only getting worse. You'll have to see a lower quality feed just because the algorithm is forcing everyone to boost their own metrics anyway.

[1] https://www.linkedin.com/sales/ssi - See your own tracking, look at the metrics description

How is this different or worse than any other social media platform? again, this feed is far easier to curate than any other social media app.

You would build a resume/recruitment platform, which has revenue directly related to how well it connects both parties, and recommend candidates over others due to metrics completely unrelated to their proficiency and job match?