If you’re happy to answer, then simply answer. You don’t need the conversation to proceed entirely on your terms - you want it to. You could easily respond to their questions first and then pose your own to make your point. Your point may even carry more weight if they refuse to answer after you’ve just done so.

Their choice not to address your question immediately after you declined to answer theirs isn’t unreasonable. Answering their question wouldn’t have prevented you from making your point; if it did, then perhaps it wasn’t a particularly strong point to begin with.