Lets simplify the effects of Policy Debate and look only at the result of the choices that the challenged player has.
There are 4 probable results:
- Lose honor and give it to the challenger in order to look at their hand and discard a card from it.
- Lose honor and give it to the challenger.
- Challenger looks at your hand and discards a card from it.
- Challenger loses honor and gives it to you to look at your hand and discard a card from it.
In a vacuum these are fairly reasonable choices, but the environment allows the challenger to easily limit the results.
The simple act of the challenger having 4 more political than the target limits the result to 2 and 3 and 5 or more political limits the result to 3. Getting a 4+ greater political is incredibly easy; you just need a personality with a political of 3 and attach one of 3 attachments (a total of 6 that can be in a deck) with a +2 political and target a character with a political of 0 or 1.
Even if the challenger doesn't limit the results, the current environment makes losing even 2 honor very damaging to the extent that letting the challenger look at your hand and discard a card from it is better for you than losing the honor in order to look at their hand and discard a card from it.