Conservatives fighting their dumb culture wars love the question "Why should x be allowed?"
The only acceptable answer is "Because we live in a free society and nobody has presented a rational, truthful, constitutional, or democratically agreeable reason for why x should be banned."
We don't live in a country of allowances, we live in a country of freedoms, and the burden of answering questions on whether or not something should be allowed lies with those that wish to implement a ban.
Never let yourself fall into the trap of defending a freedom if the person begging the question hasn't offered their explanation as to why the freedom shouldn't exist.
"I am happy to offer a rebuttal to your reasoning for banning x" is a great way to force a conservative troll to give up that they have no valid arguments. They wouldn't start with questions if they had answers.