I'd also bet that a huge portion of those offices rely on at least some kind of proprietary software that doesn't play nice/officially support Linux. MS Office, for example, or Autodesk's stuff. When I saw what a headache it would be to get these working on Linux, I just shrugged and decided I'd keep my dual boot available for when I inevitably have need.
You're turning up the cost dial for every additional workaround or adjustment you ask of people. Just to save what is fundamentally seen as $50-200 up front cost on a system for a new Windows 11 Pro license.