Is that your opinion or is that an official forum rule because unless a member states they are not comfortable with a question, then
The official forum rule is respect to other posters is required at all times.
A general rule of conversation is that you can only have a conversation when the other participant is willing. If you ask a question that they don't answer, then they don't want to answer. Repeatedly asking the question then makes it not a conversation, but you badgering them. Badgering them isn't respectful.