Buying from corporations is very convenient and often times cheaper. The problem is when you become dependent on a few corporations that produce and sell most of the product. If you have that situation than the monopoly can raise prices at will further enslaving people. We were meant to live in community were people provide different services. It not bad to have a good idea that leads to a big corporation. It is very bad though if every corporation is owned by the same cabal.
I agree that there are people looking for a life style that is not dependent on the system but I have not found many out in the wild. They want to get their checks and buy the necessities and vices to dance until the music stops.