Really disappointing

I went over to my parents' house this Sunday after church and everything is going just like normal. Until my mom asks me about the job I applied for. I broke the news to her, and she asks me what I'm going to do now. I told her I wasn't sure, which was the truth. I told her I really wanted to work within student affairs and then she went off asking how I was going to do that if there were no jobs. She offered to pay my way through the credential program then. Very enticing, but it's just not something I want to do right now. I like student affairs and I love culinary school. And then my parents, who I thought were at least a little bit supporting of me and my dreams basically told me I was going nowhere with culinary school and I needed to think about how I'm going to live my life and think about a practical job, put my education to use and blah blah blah. By that point my anger pretty much muted anything else they said to me on the subject. I fully understand what they were saying underneath; they don't want me to struggle, they want me to have a secure job. When I talked to my dad (who I thought would try to understand at least a littl bit), he basically told me I needed to "stop dicking around". That hit hard, so I went inside, hugged my grandma and mom, then Rachel and I left. It's funny, that as a little kid, your parents would say you could do anything you wanted, and then how many years later, would they seem so different from what you remembered. At what point do you stop trying to please your parents and start listening to yourself and what you want to do.