As an IT worker, it is more likely that they don’t want to deal with the headache of enterprise management of a Mac for just one person.
Just buying a Mac is easy, setting that Mac up to be monitored, managed, and secured centrally is a whole other issue. Especially when none of their current infrastructure supports Mac, because why would it when no one current uses one.
The user is worried about what type of device works best for their specific use. The IT manager is worried about what type of device do I have a licences for anti virus, what device can I audit security settings remotely, what device can I centrally manage updates, etc…
That being said, for personal use there is definitely a niche for Apple products. It just isn’t so clear cut when it comes to using those devices in an enterprise setting. And speaking from experience just one person never stays at one person. Once someone gets one, everyone will be saying “well, why can’t I get one too?”.