If existence is contingent on thought, then what of that which surrounds and is devoid of thought? Does it mean that the world that we see around us is a mere product of our thought? A simple conjuration of ideas into a complex, self-defined reality? If so, does it explain how two people can have completely different experiences of the physical world, despite the same tangible input?

I would like to think something so fantastical to be a possibility.

Sadly, I think the greater possibility is that Descartes liked the sound of his own words, considering nothing more than the aesthetic of the phrase.

I suppose I am the devil's advocate (to turn another common phrase) according to your logic.