They don't cite the source, but the claim in the article is that the average age of top-billed actors has gone up faster than the average age of the audience, not that yesteryear had 0 older stars.
His latest movie was also filmed 3 years ago in large part due to how long CGI takes but also how long movies are edited. So not only do Actors age more between filming and release, but it also takes longer for a new actor to catch on.
Aka they film a movie when their 20, it’s a breakout hit when their 23, their next movie comes out when their 26.
It was filmed 3 years ago because the release was delayed due to the pandemic. They didn't want it to flop because people weren't going to the theaters.
It was finished filming almost a year before they started shutting down movie theaters for the pandemic and they didn’t release promotional materials back then.
So, that pushes the earliest summer release as 2 to 2.5 years after filming each scene assuming COVID actually delayed things.
You can see they had settled on June 2020 as the release date, but, you know what happened next. That release date was fully locked in until it became clear COVID wasn't going away.
There were other, earlier delays: the film was initially scheduled for 2019, but they spent most of that year doing reshoots.
Implying gift/inheritance not theft. If I was a grandpa and had one in my shed, I'd probably give it to my grandkid that happens to be a top gun pilot/instructor.