Does Hasselblad photographer have to use Hasselblad camera?

There is no such thing. Photographers mainly use Hasselblad on some occasions, which can better meet the needs of shooting. You said that Bao Xide, the best cinematographer and Oscar winner, is not a master if you let him change the machine? The so-called master must choose different equipment according to the needs of shooting, which is responsible for shooting and a sense of responsibility.