a lot of market forces that incentivize the wrong behavior.

your company raised a bunch of money during the ZIRP era, your company needs to hire a large amount of H1Bs, you're a founder of 3-5 person startup that's been default dead - but your ego won't allow you to shut down the company or make it a 'lifestyle' company that's not attractive to VCs + many other factors

that's how you end up with endless jobs on LinkedIn.

Indeed has better signals.