Hmm. "Couldn't rule out" ≠ "does". I can understand wanting to hold a claim of damage to a slightly higher standard of proof. I can also understand wanting to err on the side of caution.
On trhe one hand, this looks like a nothingburger to me—likely this stuff is no more dangerous than, say, table salt (which no one expects to completely remove from processed foods even though it has known medical risks associated with it).
On the other hand, titanium dioxide is just a colourant, so taking it out doesn't alter the food in any way that matters.
🤷