Frankly... While someone is sharing the burden of bringing the money home, and returns at the end of the day, night or even month to provide the certainity that if things go wrong someone will be there to take care of the children, you are not "practically a single parent"
I had a husband who often worked away but that is nothing compared to the difficulties of raising a child on your own.
Thank you
(Says she after hearing a SAHM, who has a live in nanny, begrudging her parents' support to her divorced sister)