Breast milk is the normal milk for babies, Formula is a subsitute, it is not as good or as varied (for example breast milk will adjust in hot weather, depending on wether baby is hungry or thirsty and provides antibodies against diseases.
some parts of breastfeeding were hard, and i think 'happy mum happy baby' makes people think 'why bother' when actually there is very very good reason to 'bother' i wish every mother could fast forward to snuggling a few times a day with a child suckling and it not being sore or uncomfy or in the way. Or to a busy train with no time to get a bottle sorted when you can give your distressed child a good feed and make them (and you) feel better.
Of course it can be hard from time to time, all parenting is, but its not about giving up or taking the percieved 'easy road' there are lots of other things to weigh up too.
If my child gets a cold or flu, i want my antibodies to support that child as well as myself. Its more important to me than getting a full nights sleep right away, or being able to share feeds.