Aristarchos was put to death in ancient Greece because he developed a heliocentric model of the universe. His argument, in retrospect, was pretty damn strong (and more correct). Strength or correctness of argument means jack shit when faced with certain knowledge. The examples throughout history are too numerous to recount.
I don't see it as that narrow. In fact, I think a point being made here is that when we are considering the foundation of our own beliefs (whether or not the motivation is to convert others), we lean on our argument's strength rather than its logical merit. i.e. "I believe the correct thing because my logic is convincing." rather than "I believe the correct thing because my logic is sound." That's why he compares it to a choice in operating system. Most people cannot determine whether their choice of OS is sound, but they can make convincing arguments for their decision, and that they consider to be good enough. Which it very well might be, when it comes to OSes. I'm not sure about religion.