While nVidia is obviously doing what's best for them, us users complaining about it is anything but childish, it's about what's good for us.
For example, if 99% of the games 5 years from now use physX and you are forced to buy nVidia cards at grossly inflated prices due to lack of competition, you'll understand why people are complaining now in a effort to steer things the way of the customer while it's still early on