I guess that's why you have multiple slack channels instead of one. You're trying to justify paying someone over 100 grand a year to be a worse form of communication than the software you're already paying for to communicate.
I don't think I'm trying to justify any San Francisco salaries, lol. The point I'm trying to make is that a single person can only have so much organizational knowledge overhead. Facilitating communication between the right people without spamming the wrong people is tough.
The github corporate move from a flat structure to a hierarchical is probably a good case study to read if you're interested: https://github.com/holman/ama/issues/800