You are mischaracterizing the discussion. The builds and testing should be done in an environment that matches production, and macOS does not match any product

You are mischaracterizing the discussion. The builds and testing should be done in an environment that matches production, and macOS does not match any production server environment available today. Developing on Macs is frequently done on the MacOS itself because it’s Unix so people think it’s close enough. Once you use a VM for the builds and testing, then it doesn’t matter.