Can a Soulknife Rogue use an ability that USES a Psionic Energy Die without expending it if they have no Psionic Energy Dice?

I am a bit confused by the text of the Psionic Power ability. It reads:

Some of your powers expend a Psionic Energy Die, as specified in a power’s description, and you can’t use a power if it requires you to use a die when your Psionic Energy Dice are all expended.

Now certain abilities of the subclass do tell you to roll a Psionic Energy Die but don't expend it. For example the first time you use Psychic Whispers or Psychic Veil after a long rest, or even Homing Strikes. Do they all cease to function once you expended all of your Psionic Energy Dice or do they just mean that you can't use abilities that expend those dice if they are all expended?

If a power doesn't expend a die, you don't need to have an unexpended die to use it, because the power isn't expending the die.