Your opinion doesn't seem fair to Nvidia.

>Nvidia as the most valuable company in the world?

This could just as easily be written as:

Apple as the most valuable company in the world?

Microsoft as the most valuable company in the world?

Tesla as the most valuable company in the world?

I won't be the one to defend Nvidia, but I don't find any solid arguments to consider its business model worse or better than those of the 'other' IT companies.