Many grapplers fall into the trap of not going after their opponent fast enough once the throw is successful.
When someone gets taken down, even if they are a veteran, a small window of time opens up, it’s the window of surprise, no matter how much experience your opponent has under his belt, a good takedown will still get them surprised for a split second.
It’s human nature, the brain needs a split second to analyze what happened and decide what to do to counter-attack.