The critical thinking should be applied to understand that there are many different reasons why women choose to wear certain clothing......so if that posters argument is that women are easily led by men then they clearly haven't applied any critical thinking. They're just throwing out that old lazy line.
The shock factor.....hmm no that wouldn't be one of the reasons at all for a regular everyday woman.
Trying to look sexually attractive.......well I would say that many are trying to look 'good' or feel body confident, which doesn't necessarily mean trying to look 'sexually attractive'.
What we wear might send out signals or lead people to make assumptions but it doesn't necessarily mean that they're the right ones, or that we intended people to think those things.
Also people could reach different conclusions, I certainly don't divide the way women dress into categories saying well she's dressing for the male gaze but that lady is dressing for the female gaze.
So you could have one person wearing a certain outfit for whatever reason they chose it, and then all the different opinions from lots of different people, and the truth is that you know nothing about why they chose it and the generalisation you might reach could be way off.