Well, IC events by design are created so that people can choose between PVP and PVE -- many people will choose to run a dungeon for sure.
I think the problem here is that any inventive actually strong enough to lure people who don't usually enjoy IC into IC, is likely too OP in the hands of those who already enjoy IC on the regular. AP during MYM at least somewhat works, as it can be reliably farmed by repairing keeps and cannot be lost. Sure you're still rewarding those who have heaps of AP far more (which tbh they deserve), but PVP noobs can save up for something they want.
With TV, that doesn't quite work. Those who aren't good at PVP or IC specifically have zero incentive because they can put in hours of effort and still end up with zero TV. There's no guarantee, and putting up something as valuable as gold mats will actually have the opposite effect: IC becomes even more cutthroat, people come down even harder on killing IC noobs, IC noobs become even more scared and turn away. Sure those who put effort into gathering TV also deserve good rewards to buy with them, but in the end those aren't the people who need a string incentive to go in. Rewarding a high TV gain just doesn't lure in the people that currently make up the majority of IC-avoiders. You'd have to add a reasonably small daily limit that many can reach to get people motivated, but then it'd just be another chore to most people, AND you take fun away from people who now lose incentive because they already have the TV to get their daily reward.
In the end, ZOS has yet to find any incentive that doesn't leave non-PVPers frustrated with being pushed/forced TO PVP. If it's not worth it, it's not worth it; and if it is worth it, it's 'something good unfairly locked behind PVP'.