I admit, I have thought it. Quite often probably. 
Not in real life since I don't think I really know anyone in this position. But on here I've thought it, certainly.
However, this thread has gone a long way to re-educate me.
As I've got older and wiser, and certainly the more time I've spent on forums and 'socialise' with people outside my usual circle/type of people, the more I've become aware of my own privilege.
Which is... a happy childhood with loving parents and a resulting very healthy self-esteem. I know I am naive, but as I've gotten older, I have come to realise how rare that actually is. I've been fortunate enough to only have relationships with nice men. In fact, at the grand age of 38 I've never been dumped and never had my heart broken. I mean, I had enough random shags in my twenties with what might have been not lovely men, but I was happy to leave it at just the shag, so never got embroiled in any nastiness.
So - it's easy for me to wonder why others get it so wrong, when I've never had any experience of awfulness or had my self-esteem beaten to a complete pulp.
Plus - at the end of the day, the problem really boils down to idiotic men and women picking up the pieces in their aftermath. Trying to do their best, do the job of two people, etc, etc. They're the ones left, literally, holding the baby. They really don't deserve the judginess. The twattish men who bugger off, responsibility-free, do. So it's a really dangerous path to go down, blaming the women. Or, at best, frowning on them and their choices - when they're doing their best, and it's the man who's been the total arse.
Thanks for starting this thread, OP - I'm a bit embarrassed to admit how often I've thought this to myself, and it's helped me to re-think things quite a bit.