Capitalism isn't all sunshine and roses. I agree with people being able to buy the items they want to buy, but I don't agree with millions of cheap plastic flashlights being produced simply so somebody can have the choice to buy a pink one instead of a black one. I'd rather not have to clean that shit up from the land of my country.
Capitalism also lacks the conservation power of reliable forecasting. In capitalism a supplier modifies his or her stock retroactively based on previous demand. No matter how you cut it, you're going to be overstocked or understocked by a significant margin for at least one time, and you'll always be a little off. Being understocked is bad when you are supplying essentials. Being overstocked is bad because it means you are overproducing. If you don't restrict your production you are going to cause shortages and environmental problems.