Nah, I believe I can see into people's hearts fairly well. Personally, I believe it's the combination of my highly introverted personality (lol which I know some of you may find hard to believe) and my high level of indifference (which I feel has become oddly binary with my more empathic side) which often makes people believe that I can't get a read on them.
Also, I would never say that having a compete lack of desire of attention of any sort from men makes a woman modest per se. It also depends heavily on the reason for their lack of interest. 🤔🤷♂️