I think the original argument comes from Janice Raymond's The Transsexual Empire, which argues that trans women reinforce gender stereotypes and "rape women's bodies by reducing the real female form to an artifact."
It "makes sense" in that it's logically consistent. But obviously the argument is transmisogynistic, morally disgusting, and wildly untrue.
I think this is right and wise advice.
"Protect the kids," right? Old, nasty argument.
Pretty neat! I'm not sure I'm interested in Samara's work, but Rain was one of the first webcomics I knew that starred trans people. Cool that she's working on more.