Rude waitress... sorry this is a long one!

So I have struggled with nursing our 5 almost 6 week old son. They said he's a little tongue tied. And I have slightly inverted nipples. Well instead of fighting with him for an hour to two hours. We try to nurse often and I pump for him to eat. This waitress at one of our local restaurants saw me feeding him a bottle and said "oh, why didn't you breast feed?" I explained to her our situation and she responded "well it isn't the same as natural breast feeding.." I understand that. I can't help if my son won't latch. But I'm not going to let him starve just because we both have issues. He is a healthy little guy! 13 pounds at his one month appointment. It just really bothered me how she looked down apon me. I'm still giving him my milk?? Why does she think her opinion is right? And it's hard work pumping and feeding. I pump every 2 hours! Just to keep up with my little guy. If only she knew how much work it really is...