It might be well-known to you, but there are always people who haven't heard something before (usually because they're young), and who would benefit from a well-researched explanation as to why those points lack merit. If you don't want to take on that responsibility, that's entirely your prerogative, but runs the risk that those same young people won't be satisfied with simply being told to discount what they're hearing.
Engagement takes more work, but the payoff tends to be more worthwhile for everyone, as a general rule.