No, you made the sentence inaccurrate.

Frustrating people w/ inaccuracies, nitpicking, and unrelated examples so that they refuse to talk to you does not mean you "won" the argument.
My concern is that in many areas Walmart has driven "someone to provide those products to the market" out of business, so in case of a failure of Walmart (which I feel needs to be checked under anti-trust laws) there IS no alternative.
The free market examples you love fall apart because of their monopoly - they can't build a better or cheaper widget because Walmart controls the suppliers of the raw materials for a widget, the transportation they need to get the widget to market, and will undercut any of their attempts to sell the widget until they drive them out of business.