The reason why the gov wont talk about the alien ufo thing is

They don't know what it is either.

And being a corrupt scumbag government on either side.
They do not want to look like they don't know everything.
They simply have no idea what it is more than you or I do.
And that makes them look very weak.

All the files released about UFO's and Alien life.
That is all these bureaucrats know about it.

Now im not saying there is not some government outsourced thing that, we can't get records from.
Its probably real.
Black OP's.

But we are never going to get the truth from the government because they know less than we do.