I think this idea could be true for some businesses, primarily those that only use their endpoints (laptops) for simple documentation tasks and/or as gateways to web-based tools. However, in addition to "user demand" there needs to be an adequate business case ($$ savings) plus enough technical knowledge on the IT implementation side to made the move. I've worked in shops moving from a large Microsoft Windows footprint to Apple products and it is not always an easy transition, even with tools like Jamf.

Since companies will still have to rely on a Windows- or Linux-based backend (on prem or cloud) they'll need admins that can handle integrating those macOS and iOS devices into their MDM systems alongside the Windows systems. There are also a lot of users out there who may have no experience with using a Mac, either for personal or business use, that will need re-training to use a Mac laptop. Both integration / transition of systems and users will introduce delays and downtime into a company's business processes, increasing the cost to transition.

None of the above is a reason not to move from Microsoft to Apple, but it's definitely not a simple process and that can lead to slow (or no) transitions for large businesses, no matter how many users ask for it.