Reality has never mattered. People still think the world is flat. Unless a belief is stopped by a physical object, there is zero incentive to lose faith. 1+2=4 until they have to count something they think is important. Then it is 3. Eventually, if enough people laugh at them, using their own evidence against them in a manner that requires physical acceptance, only then will someone with strong beliefs waver in their faith.

Some refuse to acknowledge they disproved themselves to the point they accidentally start harming others. Like a doctor that thinks homoeopathy will cure their cancer patience. These people are usually put into asylums of some sort.

Others re-contextualize their beliefs into a new framework for a new faith.

The more physical proof showing undeniable facts the harder it becomes to appear sane when denying them. This allows us to differentiate between someone going along with the crowd and a dangerously delusional sycophant. The average person wants to fit in, but will walk away if things become unbearable. A cult will prevent them with threats/actions. The sycophants that crave approval from their cult leader will have no response to the facts. They will pretend the fact do not exist, even if it means hurting themselves and others, to prove their loyalty.

Every grain of sand added to the other makes it more and more difficult for the average person to join the cult. If you know they're a cult you are less likely to join them. In the long term it matters. Although, it will be many years before anything comes of these facts, if at all. At the very least it makes for some good reading when all of this inevitably gets published into a banned book someday.