It's not like the parks were empty - they were at Covid era capacity.
The real problem is that so far the celebration has consisted of some new paint and statues, a media event not open to the public, a D-ticket cloned from Paris using boarding groups, added EARidesence, two new night time shows that have nothing to do with the 50th, and primarily, the call of the magic merchandise.
I might be missing something, but I'm skeptical that these next 18 months will be that special for the average guest.