How does a free enterprise economy's freedom of producers provide benefits for individual consumers

The market economy or free enterprise economy has provided many benefits to people but I think the best of all of them is that it is the best method to assign prices specially if we talk about basic supplies. I live in Peru and for me it is like a miracle when I go to a corner store and with one sol I can buy 5 pieces of bread. In Venezuela that has controls and there is no free market economy the shelves are empty and to buy bread you have to wait in long lines.