Here's why:
* Trigger Effects: Ocean Dragon Lord Neo Daedalus' effect is a trigger effect. It activates *in response* to a specific event, in this case, Umi being sacrificed.
* Timing of Effects: Trigger effects resolve immediately after the event that triggers them. This means that as soon as you sacrifice Umi, Neo Daedalus' effect will activate and destroy all cards on the field.
* Trap Hole's Activation: Trap Hole needs to be activated during the opponent's turn to destroy a monster. You cannot activate a Trap Hole before an effect that has already been triggered and is about to resolve.
Therefore, Neo Daedalus' effect will resolve before you get a chance to activate Trap Hole.
What you can do:
* Chain a Trap card: If you have a Trap card that can negate or cancel an effect, you can chain it to Neo Daedalus' effect. This will prevent it from resolving and destroying the field.
* Use a monster effect: Certain monsters have effects that can negate or destroy other monsters. You can use a monster with a relevant effect to counter Neo Daedalus.
* Control the field: If you can control the field and prevent Umi from being sacrificed, then Neo Daedalus' effect will not trigger.