Reality is:
1. Screening tools (background check, skills analysis and testing) are really good. There's really no reason to put someone through a six-week gauntlet just to find out if they can do the job.
2. Interviews are really a tool for seeing if coworkers and managers get along with the candidate, and the candidate gets along with their future coworkers and managers. In many companies interview == where manager has discretion to hire the people they want. Lots of interviews usually means lots of managers who all want to put their stamp on the hire.
3. Being good at getting hired is a function of experience getting hired. The skills needed to be a good candidate do not align with the skills needed to be a good worker in most roles.
(1) just isn't true. It's at best a mixed bag.
(2) is somewhat true. Team fit is pretty hard to figure out without interactions, and agree sometimes managers just want to get their oar in.
(3) is oversimplification. There are definitely people who are better a getting hired than doing the job, and they are hard to weed out early in their career. If you aren't able to identify good candidates in front of you though (e.g. the FN, not FP) there are problems in your process, not the candidates.3. Agree, it's simplified, but for most companies, field and "hiring" managers are barely able to do an effective interview, let alone smoke out someone lacking interview skills from one lacking communication skills.
Especially because lowering the barrier usually means getting more low effort application.
People either put a lot of effort on few applications and invest significant amount of time in each one hoping to increase the chance they get picked up; or they put a lot of effort on reaching out as much as possible, knowing they have a very small chance on each application but playing on volume.
Most recruiters are only interested in the first category of candidates. Having a long initial process is a feature. The goal is that the second category considers that given their chance of getting picked up, it's not worth filling the form.