They don’t think I’m good enough for my course

A college tutor said they don’t think I should do the course I wanna do. I wanted to do business with marketing and finance for years now and I’ve already studied some of it last year but when I went to sign up today to study

They was like “are you sure that you are want to do this course, it’s very hard”

And I just felt like they were be littling me because I didn’t have the best grades or attendance. Ive wanted to do this course for years now and it’s just really upset me how she made me feel really shitty and now I don’t know what to study.

Any advice please ? And don’t just say they’re looking out for me because they should encourage everyone to aim high and do what they like

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Update: I spoke to the same lady again today and she ended up letting me on the course and I start tomorrow :)