A nosy question is nosy because it demands an answer to which the querent is not entitled. Whether that undue desire is motivated by curiosity, prurience, arrogance, pity, or simple fascination - and I have seen all of these, sometimes in combination - has no bearing on the effect of the question on the one so asked. The vice inheres in the asking, because that forces the choice between refusing to answer and arousing the ire of jilted entitlement, and giving you an answer you have already done much to suggest you are not prepared to understand.
Within acceptable error, everyone who ever tries to have this conversation from your side proceeds from here to umbrage at the idea their behavior within it is in any way either predictable or discreditable, owing to the purity of their intentions.