In no way do I believe you have to ask a thousand questions to gauge compatibility. Compatibility doesn’t guarantee a successful marriage. There is nothing wrong with wanting to know as much as you can as long as you will be committed to the woman you marry.
They could lie of course, but if you ask enough questions then it will be harder to get away with a lie. If she does lie, it is time to move on. I am glad to say that my wife has always been consistent in her answers to me.
She proved to me she was worth the investment of marriage after I asked her if she would become my Love Beyond the Sea!