There’s not a lot of chatter about coffee being healthy or unhealthy. The only unhealthy thing that people tend to want to avoid is being unable to sleep due to drinking too much of it or too late.
Another cultural thing is to joke about the first cup of joe being mandatory if you want to wake up properly (at the office). In that light it makes sense to not really consider whether it is healthy or unhealthy; it’s as if your body needs it anyway so you either gotta get it or sleepwalk through the day.