Maybe governments around the world have always known about objects flying/floating around. And that was fine because there are many natural causes that could explain these blips on radar. Many weather phenomena or man made objects could explain people "seeing" UFOs. Buzz Aldrin famously saw glowing objects flying around in space but he does not necessarily believe they have ET origin.
But recently, there's simply way more of these objects everywhere, and nobody knows for sure what these are. This worries some people because, well, what if they're Chinese spy balloons or drones? Remember when the US military shot down a couple balloons some time ago and it made the news?
This is a potential threat to the national security and it makes sense that they have put together teams for the retrieval of these objects. The government may not believe they have ET origin, but they now see them more as potential threat to the national security.
Of course, I would definitely find it enjoyable and exciting if there is some "otherworldly" intelligence behind these objects.