I agree of, non-free + proprietary == bad, whereas the opposite == good, but it is not the only consideration. Many computer software can be good or bad regardless of such thing, but free software is still a better idea than nonfree software. If program has some problem (e.g. malware, or a feature doesn't work the way you want it to be, or whatever), you can hopefully to correct it! That is why free software is good and nonfree software isn't good.

But, it is correct, reality is not really so neatly categorized into binary outcomes with no shades of gray (and other colours).