Maybe one situation where this is a good idea is when the current "designer" is even worse than you are. In that case you add value through your design skills a

Maybe one situation where this is a good idea is when the current "designer" is even worse than you are. In that case you add value through your design skills and you're the lead designer in a designer-free company. Obviously that only works if you know the company isn't actively looking for a real designer, in which case your work will disappoint.