There is a long historical tradition within feminism which recognises difference (i.e. that women bear and raise children, and have emotional qualities which men may lack) and seeks equality on those grounds, rather than through emanating male patterns of behaviour. It's a big leap from accepting difference to seeing this as a justification of prostitution, though. Accepting difference does not preclude equality, prostitution does.
I may be missing something, but how is an escort really in control of what she is doing? That is an illusion. The punter pays his money and gains control of her body - isn't that the point? I mean, Mr Interested above is a prime example as a PP said, his wife won't 'give' him sex, so he uses his financial power to gain it elsewhere. It's an FU to both his wife and the woman prostituting herself, one more literally than the other. Maybe there are things the women prostituting herself won't agree to, but it seems delusional to see this as a relationship of equals - he is buying her, he has the power, the more desparate she is for money, the greater range of acts she will agree to surely. If it was a relationship of equals, money wouldn't need to change hands.
And prostitution is crucially different to other jobs where people might campaign for equal pay because women are selling access to their bodily integrity, and there is no moral good to society which comes of it. That is not to blame women in that position, as I said before, the problem is created by demand.
And finally, as I have other things to do, I think the smoking analogy works to an extent: namely that those justifying and sanitising prostitution here are employing a range of rationalisations to resolve the cognitive dissonance which arises from knowing that what they do damages people. Smokers similarly employ a range of rationalisations to justify continuing smoking in the face of health dangers to themselves and others.
And finally, to the pervasiveness of sexual imagery in society and the harm this does, prostitution is not separate from this, it is the logical conclusion of it - if you have a society which depicts women as sexual objects, which grooms young girls to be sexual objects, then you have a society where women are expected to be available sexually.