Thus I can't see the point of doing four passes when one and a half will do.
For the sheer enjoyment of it.
If shaving was that enjoyable -well - we'd be shaving three or four or more times a day.
But we don't.
What makes you think folks aren't shaving multiple times a day?
I have been doing a single pass lately because I prefer the look. On occasion I will do a three pass shave. A lot of these gents are probably getting by on 1-2 passes for a BBS shave due to superior technique. Even my 3 pass isn't exactly BBS