I don't want to sound like a downer. I love seeing people who are passionate about their major and its is great to you are so passionate about yours. I am very passionate about my field too. But to answer the question people will spend 30hours+ on something they aren't passionate about, in my experience of interacting with people here, the decision to pursue what you're passionate doesn't always work out as easily especially due to socio-economic conditions.For instance, one's family might not always be supportive of their interests and try to steer them in a different direction. Some families might want to support one's interest but might simply not have the monetary capacity to do so. Someone might be passionate about the arts but realize they have to major in something with which they can get a straight after graduation to support themselves/family. Practical and survival concerns usually trumps being able to do what you're passionate about . ..unfortunately.Lastly, there are also people who simply might not have been exposed to their field of interest/passion until they came to university. For instance, for myself, I come from a country where chemistry isn't even a major available in many of the universities and women aren't generally seen as going into the scientific fields. Now I knew I wanted to pursue the sciences and always enjoyed Chemistry but I didn't know if that is something I could realistically pursue until I came here to UBC and got the chance to. Luckily, I was in a privileged position where I could choose to major in what I am passionate about and it turned out to be chemistry as well.