I use a Hasselblad and a Pentax 67 and personally agree that the 67 makes better sense outdoors. I bought my replacement Pentax 67 body from someone on APUG, who sold it because he found the RZ67 better for indoor work. The Hasselblad was my first and it would be if I was about to embark on MF now. Not to fear monger, but it's also somewhat future proof.
Also, it's easy to make photographs like that when you know celebrities.