I have 3 college-aged kids and one nearly there. Their universal concern is the cost. It has become prohibitive. Colleges assumed the trend of charging $25k to $50k per year would be sustainable. They were dead wrong, especially given the horrendously predatory loans backed by the government and barred from bankruptcy. If we fix the college financial system, enrollment would likely skyrocket.
Millennials have been out there for nearly a decade yelling on social media about how ridiculous their student loans are. Kids on the precipice of college have started paying attention. Combine that with the restrictions for Covid, and you have a lot of kids who don't think that taking on tens of thousands (if not hundreds of thousands) of dollars in debt is worth it for some Zoom classes.