My husband says its easy to stay at home with a baby all day while going to school full time

I'm upset because my husband doesn't realize how hard it is for me. He said that he does more work than me at a lumber yard and he told me that being a mom is easy. He said, "All you have to do is feed her, change her diaper and put her to sleep. It's easy." I just think he's ignorant because he's never had to take care of our daughter alone for even an hour. Whenever he does something for her, he always asks for my help. But when I told him this, he still didn't change his opinion. Do you think working at a lumber yard is really harder than being a stay at home mom and going to school at the same time? I also am the only one that gets up with the baby at night as well.