The short answer is an emphatic No.
Nihilism is a western philosophy that developed at roughly the same time as Marxism, though it has earlier roots. It's a position of extreme sceptism. Solipsism is this nihilism viewed from the point of the self.
Buddhism is not a sceptical position. Instead, it points to the impermenance of all things and including the ...
There must be some reason why we exist, not as humans but as matter. Why do physical laws work in the way they do? There must be a reason.
This is not a question nor a logical argument, it is known as the Argument from incredulity fallacy. So it's a well known logic mistake to make the claim that you made above.