The point of all this is not to bore anyone to death but to say that parenting is labor like any other--you do a job, no matter how much you like it, you have earned bitching rights. The bitching rights go up in inverse proportion to the pay, which means that mothers have the official right to bitch non-stop if they want to.
sums things up nicely.
Molly takes the opportunity to locate some anti-mother bias in some feminist circles.
Personally I think mothers have a rough deal and am glad I'll never have to be one ;) (though I would hope that no one else has to be one either)