You're trying to argue semantics, sir. 😛
1. The triforce is always active, it has no off-switch, it's constantly using it's power.
2. The triforce doesn't give a damn about time, anyway, as seen in TP.
3. It has the power of the creator of time, and therefore so do Link and Ganon.
4. Being compressed goes directly against what Link and Ganondorf desire, she'd probably have to overwhelm their own reality warping. 😬
5. Claiming that TC just works on something like that without evidence that it does is fallacious, especially when by the standard set, the triforce's time powers are greater.
Let's make thigns a little less abstract for a moment. Let's say Ultimecia is in Street Fighter, and she can Shoryuken, and Shoryuken lifts people off the ground unless they block it.
what happens when she tries to Shoryuken something heavier than she can lift?
Could Ultimecia compress Nayru against her will? Nayru is heavier in time than anything Ultimecia has compressed before. This is just one third of the triforce.
6. Link's immune due to the power of friendship thing anyway.
Without time compression, Ultimecia and Squall are both horrificly boned against the triforce, really.
Edit: did someone seriously try to argue SEPHIROTH for the power of friendship immunity? I lol'd.
But I can't see in that emphasis where it says your friends need to be present.
More edit: And yes, the triforce does actively protect it's wielder. 😛 Even the seperate pieces.
-It's done so to Ganon on several occasions.
-It protects Link from the twilight field.