I disagree with that.
Nice photos can be taken with any camera. I've seen and taken a number of nice photos with an old 2 MP Canon A60 from 2001. The image quality isn't good, but the photos, as a whole, were nice.
However, the nicest nature photos I've seen, at least in the digital era, have been taken with nice cameras and equipment. This is particularly true with regards to animal photos, where long telephoto lenses are needed.