Some of what long-time EAs might have to offer (possibly but not necessarily including you) is:
perspective on what has and hasn’t worked well for EA in the past
general maturity and accumulated experience that can help you mentor EAs who might want help with general life skills or general professional skills
a sense of gravitas and reliability that could suit you for joining a board of directors or board of advisors or otherwise representing EA to the outside world.
Thanks for writing this up! I broadly agree with your points and I think it’s an important topic. One factor that I see as pushing in the other direction is that many EA-affiliated orgs are small, new, and/or have uncertain futures. Investing in the design of a higher-quality recruitment process makes the most sense when you’re confident that you’ll get to reap the benefits of that process across many hires and many years.
If you have a six-month runway during which you plan to make one or two hires, it’s less cost-effective to spend dozens of hours improving your general hiring process (as opposed to simply trying to make the right individual hires). It’s also less feasible to gather statistically meaningful data by running experiments on your (tiny) number of top candidates; even if you’re willing to invest massive resources, there just isn’t enough data yet to support most types of experiments.
I enjoyed the challenge of recruiting for the EA-friendly organization I led (the Center for AI Policy), and I would be happy to consider full-time recruiting roles, but I wanted to point out these challenges. It’s not just that people aren’t aware of or interested in better recruiting; it’s also that sometimes their organizations aren’t large or permanent enough to justify large investments in recruiting skill.