I couldn't really follow the logic of this statement:
"Before anyone calls me a hater because I don’t believe surgery makes you something you can’t be, explain why a boy who wants to see what a roomful of naked 15-year-old girls looks like won’t say “I feel like a girl today” for a chance to shower with them."

Can you help me out? I mean it! She is saying she doesn't believe surgery can turn a male into female, and if anyone thinks she is wrong, then we need to first argue that straight boys won't try to take advantage of this law to see naked girls. Is that the gist? Why do we  need to explain the boys thing to convince her about surgery?