Totally agree. I remember the first days of Algebra at university and you couldn't understand anything what the teacher was saying. Some freaked out as if they didn't know it now, meant they will never understand it (fixed mindset) and some thought "hell, I don't get it but I'll probably understand it once I studied it for a while (growth mindset).

In high school, smart students can often get away with not studying. In university, your attitude and mindset towards failure and learning becomes much more important.