As best I can tell, "people who sometimes ask questions they might not want to hear the answer to" are a large majority of the population. "Does this dress make me look fat" is a cliche put-you-on-the-spot question for a reason.

Sometimes is an important word here. Too often, and it might be an issue, but it's not like this was a regular occurrence with her. (A big THANK YOU here to Pablo and hyporational for noticing they shouldn't be making too many assumptions based on one anecdote.)

Now, another approach is to exclusively date people who value total honesty at all times. But (1) there are other qualities I value more in a mate and (2) I suspect such openness to "total honesty at all time" tends to correlate with being social inept and overly honest even with people who don't want that, qualities I'd like to avoid.