What I didn't understood with this movie ending is that what they did will not solve the problem. Sure the robots will use all ressources available to try to cure as many humans as possible but all this technology only exist in the first place because people on earth are exploited to produce it and because the distribution of ressources is only limited to the elite.

Once you want to give everything to everyone you will figure out the ressources are not unlimited and it's game over, back to the beggining.

The only solution is to accept that ressources are not unlimited and we cannot all get everything we want. Until humanity accept that no one can have more than another, we will not reach utopia.