>>4176179You can but it's of a limited scope (forget flashless available light portraits in dim venues, forget crop-heavy wildlife and event/sports snaps because the aggressive denoise and sharpening needed looks unprofessional) and if you have competition it becomes less viable. If you shoot for magnum, on name alone, regardless of quality, you do not have competition. In studios quality and vision rule, but this is photojournalism. First name rules. Name gets you hired and approved. Second, travel rules. Nothing else matters because no one else was even allowed to be there and no one else was there.
Here's the photo he shot professionally and won a contest with using m43.
Ironically M43 is worse for hobby work than for professional work because hobbies (and freelancing) cover a vast amount of genres, and this guy took out his olympus specifically for a photojournalism assignment. He also shoots a lot of full frame DSLRs for other jobs. Mirrorless FF to me is peak hobbyist camera. Not as compact as compact, not as genuinely work oriented as a DSLR.