Because the big bad is always all too powerful and all too weak at the same time. Turns out werewolfs are brought down by silver bullets, vampires have to sleep in a coffin and can get stabbed, demons can’t go past a ring of power, aliens invaders with bacteria. No other arrangement will work. If the enemy is all powerful they just take over. If they are all weak no one cares about them. Only the exact combination of threatening but easy to defeat allows drama to exist.

So of course the government is smart enough to pull off incredible fears of social manipulation but not smart enough to hide it from some podcaster “just asking questions”. No other arrangement will work. If the government is always dumb they can’t do a conspiracy, if they are always smart they can pull it off and no one will know. Non-working arrangements don’t get propagated and their lines die off, the working arrangements infect new hosts and spreads.