I would add here that bespoke actually means custom. The other disciplines you mentioned are commodities. You can get them everywhere. If you are starting a film studio, you must have a director first because every film is bespoke. You would farm out the commodities like accounting, lighting, etc.

All software is new and bespoke, otherwise we're not writing software we're just integrating existing parts, and that's the difference between IT (and CI/CD) and architecture/programming. You can hire for all of those, of course, but you cannot be at the helm of a company that depends on bespoke architecture and programming without being that person yourself.