What a naive attitude. There are companies who have the same jobs posted for years without hiring anybody. This is easy to find, using search engine caches.

Also normal discussion with HR persons, will quickly make realize most job posts are fake. They just have it open in case "the right candidate comes along..."

And most important you have payrolls dat from companies like ADP, and internal data from aggregators like Indeed.

About 3 in 5 jobs are ghost.