No, the most common way to make money through software is to use the software to run a business, regardless of which license it is under.
Your statement was likely intended to be: "I use proprietary licensing as a connotation of business friendly in this context because it is the most common way to make money BY SELLING software LICENSES." But, by wording it that way, it makes it somewhat obvious that it is somewhat of a circular reason. If I completely miss-interpreted what you meant, please do clarify.