Oh, you're absolutely right! Of course more ethical or natural wine costs more to produce and present appealingly. You're absolutely, completely, 100% correct on every point.
I might be a bit skeptical that it costs $3-4 a glass more, however. I wonder if it's not at least somewhat about having an aspirational label that can be applied to justify a significant upcharge.
Not sure about wine but in other areas, organic agriculture can halve the yield (more for meat). Could imagine the same for grapes. That plus more expensive handling after harvest (often simple due to lower scale) can easily triple the price.
