Hi Design-freak
I am not sure that Leica M9 users bought their cameras because they think that the pros use it. There are various reasons. Some buy it for status, some because they love rangefinders, some because they need a small camera with great image quality, some because they like the look and feel of a Leica, etc. I think most are aware that this is not a camera that pros in the studio and in the field pick as their first choice, but some pros might use the M9.
The Hasselblad system is definitely a pro workhorse. Rental availability is high and the system has been out there for a while to get wide coverage. The S2 system does not have this in place. So far there is only one S2 camera model out there, which limits the potential customer group. Hasselblad has various camera models, which creates a wider user group, more demand for rental lenses, etc.
So in the end the S2 might address similar customers that the M9 addresses. Of course in a different field. People who buy it for status, people who love a smaller system with great image quality, people who like the look and feel of a Leica, and of course some pros who might not need a rental system in place but a good service.
If you favor the Hasselblad system then buy a Hasselblad. Pros and some amateurs have created great results with it. The only question I have is, what makes you think buying the S2?
BTW I am an amateur, not rich, I own a M9 and love it. I grew up with a Rollei 35T, moved to a Mamiya 7, then Fuji GW690, Leica M6. I use SLRs too but I feel home with a rangefinder. Would I buy a different brand, something good but cheaper if available? Totally.