the concern about skepticism is not irrelevant, but many of these skeptics also are skeptical of the earth being round, or older than a few thousand years, or not created by an omnipotent skylord, and I'm not sure it's actually a significant concern given the current number and expertise of those who are skeptical
so, we can hear their arguments for their skepticism, but that doesn't mean the arguments are valid to warrant the skepticism exhibited. And in the end, that's what matters: skepticism warranted by valid arguments, not just any Cletus McCletus's skepticism of heliocentrism, as if his opinion is equal to that of an astrophysicist (it isn't). And you know what? It isn't necessary to convince a ditch digger that the earth goes around the sun, if they feel like arguing about it.