I'd have to say it could be any of the above.
Doglegs can help to fit holes into problematic properties.
Doglegs can be bad architecture, if overused. But, they need not be bad architecture, they just sometimes are.
Doglegs could be overused by a designer who just happens to like designing doglegs. Maybe they are fun for him/ her, and they don't implement restraint in their designs.
As a point of clarification, we're talking holes that actually dogleg, not holes that have fairways set at an angle to the tee orientation....right?
I'm awaiting your reply to the question, Pat, as I would assume you have a specific example of a course with many doglegs that is considered great.....
Joe