It may look like the natural thing to do – in order to be creative, you should avoid seeing what others are doing.
If you really want to create something original, it may seem, you need to ignore the footsteps of your predecessors.
I’m 50-50 with this. I’m not sure of a 100% solution.
On one hand, it’s good to see what others have done before you, so you can improve on it, and not come up with a strange solution. If you don’t know what others have done prior to you, you risk doing a similar piece of work or coming up with something which feels out of place.
On another hand, if you want to be totally creative, it might help you not knowing what others have done. This solution is not applicable to agencies, where you need to know what others have created, so you don’t go into copying other people’s work.