I’d say generally for most people, at least anecdotally, their work laptop is their only laptop because they’re expensive and have good specs. Especially for Apple products (which is the majority of the share of hardware in this anecdote), it’s natural to want and expect the continuity between devices.
Employers usually allow this or don’t explicitly forbid it, and most employees aren’t exactly security conscious or willing to sacrifice convenience. So it’s not that shocking to me, but it is weird that there isn’t more education or rules around it.