I too in the "no" side. Take for example some of the most famous images taken years ago with pinhole cameras.
Some of these images can be seen in the link below, but can be found in the Internet. Lots of street photographers became famous years ago because of the photos they took with point & shoot cameras. In reality the camera used, regardless of kind, is not what makes a person "a serious photographer."
A few photos taken with pinhole cameras:
Discover jamesolivershaul's collection, Pinhole camera photos
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These images were taken by a very serous photographer using other very old cameras:
Discover curatereynolda's collection, Edward steichen
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