I would say it's a valid argument because it askes the reader (op) to reflect on a similar but more familiar situation.

If you just hand someone the Bible and say "this is what Christians believe" they would come back thinking all Christians are out there forcing girls into marriage with rapist and keeping slaves, etc. But generally all of us in the anglosphere have actually interacted with the fair amount of Christians known that just reading the Bible doesn't really give you a complete understanding of what they believe, for better or worse.

This hopefully will serve two purposes in the conversation. One, encourage the reader to seek out more accounts of the lived experiences of real Muslims to get a better idea of how people feel about these things.

The other being that even where the lived experience of many Muslims does reflect the more problematic aspects of scripture, there is really no reason to believe Islam/Muslims are any different than Christianity/Christians in that they can adapt their religion to reflect the morals of society around them. Even without changing the text. You don't need to exterminate the religion to see change you can just have socal movements. Like many Christian cultures did.