Yes, it is, any situation where there is only one parent is obviously, logically going to be harder than a situation where there are two parents. In this way it would be very hard for a single father too.
@Adaydreambeliever while i do agree with you...it also has to be said, some people are crap at parenting, so doing it alone is preferable to having a parner you can not rely on.
@RubySoo Absolutely, I will grant you that.. I was just saying so today to someone.. that so many people become parents who really shouldn't. So, yes, you are right, I think in my rush to be brief, I will have left out many things that are relevant to this debate.
