What you or I do does not imply what "most people" (the phrase used twice in the citation) do. Software-wise quite a few people might use either system but changing systems also requires changing low level system usage, habits, Apple tax, possibly notch and more. One might claim "many people" (that is, maybe 20 ~ 40%) but "most people" (>50%) is a stronger claim.
Compare interchangeability of Windows and Linux. Many people might change but the "year of Linux" never arrives, it seems. Changing systems can be a hard hurdle despite the occasional "grandpa did it" reports or flexible people like you.