I don’t think anyone is marginalizing suicide or denying that some schools and some majors are known to be more intensively competitive than others. The point is that while such environments may be a stressor, a student with no mental health issues, a supportive family and whose self esteem isn’t predicated wholly on academic achievement isn’t going to commit suicide because of such pressure. They will either deal with it, transfer to another school, or change majors.
College is a big change for young adults and mental health issues often surface during that time. But the issues are already there. The environment may expose the issues - that doesn’t mean it created them.