In short, the mostimportantfactor in whether or not a programissecure — whetherit'sFLOSSorproprietary — is whether or not its developersknowhow towritesecure programs.
However, the detractors of solar do notfactor in all of the subsidies given to non-renewable energy (hundreds of billions of dollars a year in the USA), and they do notfactor in the cost of our military to secure foreign oil supplies or our ongoing medical costs due to air pollution.