Sometimes it is better to get out while you still can. During Yakusoku Kumite type of training you are grabbed first - most of the time.
Then you react.
In a way the type of training is fine... But. Think about it for a second. Actual techniques are executed before the opponent takes hold of you.
It is like Go No Sen, Sen No Sen and Sen Sen No Sen. It is the same idea.
Which one do you practise? And which one will prove to be effective in reality? Or is it not as simple as that?