Seems like everything good would have been invented by people anyway, and lots of the bad things are done in the name of profits. Maybe they would have also happened in another system, but the point stands.
What, like, Double Stuffed Oreo's? Can we even call those good?
As wasteful as capitalism can be, there's a difference between building an extravagant office/research park and building an extravagant mausoleum. I would rather we direct society's resources towards upgrading the means of production than towards erecting a mountain in a desert.