Actually this is BS. Most women do not have a BS-radar. They have a confidence-radar or a self-esteem-radar. I have seen enough liars/narcissists who are overly self-confident being succesful without any serious intentions. Also I have heard enough girls/women cry about that. Sometimes it is even like the woman knew he was not sincere, but still better than a boring loser, lol. Also I have realized at some point, that being honest, truthful and open just sucks when trying to flirt, date etc. At some point I realized when I got totally drunk and acted like a complete asshole it worked wonders with the girls. That was a turning point in my dating life and I learned that talking bullshit, not being serious, just trolling around is insanely succesful compared to my previous dating-self.
From my experience this is what 99% of unsuccesful males must learn first. Most of these guys think (myself 20 years ago as well) it is like in Disney movies, they should carry women on golden plates, treat as rare unicorns and listen to all kind of bullshit 100% of the time. Once they have learned to bullshit, it works so much better.
So I can only repeat myself, women do not have a BS-radar, they have neediness-radar and when guys appear needy they are unsexy as hell. Bullshitting is in contrast the way to go. Of course there is a master class after that, where you talk about deep stuff and are really open about yourself etc. but that is not suitable for most men and not suitable for most women. The reason is that if you go with that it will be too intense for most people and awkward moments will happen too often. Even if your self-esteem and confidence is enough to just openly talk about your stuff without letting any guilt, shame and other bad feelings out, your talking partner will often not be able to be cope with that. That is why you bullshit around. Once you have mastered that skill and you are dating a couple women in parallel, then you can start doing this real talk and be open about everything, this will filter out a lot of girls but you will be left with those who have good heart and are fine with themselves. But you cannot switch that around, even if Disney movies told you so.