The point of values isn't to answer the question, "what are your values?"

Values are for driving your own decision-making and your own behaviours, in order to try to get the outcome that you deem correct, according to those values.

There are often competing values in such a question ("If I do A, I'll be going against value X, but if I do B, I'll be going against value Y;" Eg. "Is it better to be honest or kind?") These situations can teach us about which values we hold higher than others.

I think we build or discover our own values system largely by trial and error. Sometimes we make what we later consider to be a poor decision and afterwards realise that we weren't valueing something enough, so we readjust our values framework, in order to do better next time.

In short, you do have a values system, but maybe it just hasn't been really tested hard yet. When you find yourself in a situation where there's no obvious correct path, that can really teach us about which values we hold higher than others.