[acomar]

You're arguing against a straw man. The free software community has stood by using free licenses and selling exceptions and dual licensing. The FSF explicitly sells its code and gives you the source along with it. The community holds that software should be free as-in libre, not free as-in beer. This is a distinction that has been made time and time again.

That is, you are always free to charge money, but you are not free to withhold source or prevent modifications/redistribution of those modifications, because this restricts the rights of other human beings. Or said another way, your freedom stops where my nose begins.