Even while capacity is being held down, most days aren’t seeing any theme park actually hit the new cap– so an even smaller number of people are actually inside the parks most of the time.
That wasn’t the case recently, as WDWNT reported that the Universal parks hit capacity all weekend.
Hitting the limited capacity, even occasionally, shows that the demand is certainly there for theme parks right now.
We know Walt Disney World is only allowing about 35% of the total number of people possible inside the parks, and Universal is likely seeing similar numbers.