The fact that they don't know anyone directly affected badly drives a lot of that.
Our kids are the same age, but couldn't wait to get their 2 shots each.
Understand we are northeast and got hit hard by this, including the deaths of two teachers and two next door neighbors so there is definitely a healthy fear based on reality. There were many funerals here due to covid and that was before the Delta variant.
The colleges our kids went to were either shut, or when allowed back on, twice a week negative tests were required. Our older one graduated via zoom. Our younger stayed on a campus that was very strict in protocols and testing. Even now, except for those in the smallest circles (such as roommates), they stay masked even though fully vaccinated.
This is stlll life and death stuff.