Totally agree with your first statement. Some sort of normalcy will return to life as COVID becomes endemic.
Universal, 6 flags and Hershey aren't seeing any consequences/cases because we have no robust disease surveillance in most of the country. Undoubtedly (mostly un-vaccinated) people are catching COVID at indoor locations or intensely crowded outdoor locations in these parks. We can't make the risk 0 obviously, but masks, for now, certainly help. I masked on main street a few times this week, it was pretty crowded! Overall I was very happy with the crowd levels this past week!