On a simple level, certain equipment is needed to achieve the style you desire. Part of photography is developing a unique style of your own, and in most cases the equipment plays a major part of this. I want 8x10 razor sharp contact prints, etc. I'm not going to get that with a Holga. OTOH if I wanted a more soft and dreamy abstract look I might demand a Holga. I base equipment purchases on the look and style I want to achieve, but I can see how some people purchase equipment hoping they'll get 'this' or 'that' kind of style out of it. That's probably when they get into trouble and loose their way.