Yes, people with no kids do get preferential treatment and no, it's not right.
If you choose to have a child that’s your own business, you shouldn't expect your colleges or employer to cover for you.
I have three children so I am aware of the demands which that places on parents but just as it's not OK to pay men more than women for the same job it's not OK to pay people with children the same as those with none if they are not doing the same job (i.e. hours, holidays, flexibility etc).
Agreed. In my experience, salaried staff have always been expected to put in a little extra time if circumstances demanded it. Often, there would be no extra pay, but there would be some latitude with regard to doctors appointments, etc without loss of pay.
I'm disappointed that most of the responses have been leaning towards telling the OP to drag themselves down to the lowest common denominator.
A good work ethic should be applauded, not derided. Like a few others, I'd question whether some people have made the correct employment choices, if they are so unable & unwilling to show some flexibility.
Without wishing to go over the top, it's attitudes like this that can lead to jobs being lost to other markets. Certainly, no-one should be a slave to the workplace, but there must surely be some room for common sense, and in return good employers should recognise this.