I empathize with the author, but definitely they are missing the Big Picture. Just because everyone’s using SolarWinds, does that make it safe to use? No. Now replace “SolarWinds” in that previous sentence with “bcrypt”. Author’s sole argument for security is that ‘everyone’s doing it’.
Auditors also can’t just allow any Tom, Dick, or Harry to write their own cryptography hashing algorithm and call it secure.