The only things getting released in hi-res are the things they don't mind you (or want you) seeing.
Especially if it's of a military operating area, let alone a site as infamous as Area 51.
But in this instance, it's a US company.
They didn't get "caught out". It's an acceptable or even intentional release, rubberstamped by the overseers, likely of the NGA flavor.
And since the jet was there on multiple days, it's almost like they wanted countries with less than full satellite coverage to have time to get a peek.
If you are talking about EO satellites, China is already launching them.
https://www.google.com/amp/s/m.economictimes.com/news/intern...