But why are they only using one sensor?
Trying to eliminate gambling has vexed many an emperor and cleric.
In a bit of expensive equipment I own it happens to have 4 temperature and pressure sensors, located in two different locations on the unit. All of them generally disagree with each other on the exact temperature by around 0.1 C, which is fine for my use of it.
Building Byzantine fault tolerance into absolutely everything is expensive, and makes everything we do and buy more expensive. It would be better and cheaper to rely on social trust, if that's possible-- and it was possible before these gambling sites. Prediction markets are burning social trust as fuel to make profit, they should be heavily taxed, the way polluters are taxed, as destroyers of the commons.
I can reasonably test that the bolt is in a locked position every time I close the door and turn handle on the lock. But a single remote sensor could have malfunctioned or simply be out of calibration a few degrees.
If the actual temperature at the airport is important to any set of users enough so that the difference between it being 18 or 22 deg C is relevant, one should expect that there be at least 3 sensors (much like clocks) and assuming variances between the 3 sensors are within tolerance an average of the 3 temperatures is taken.
Three sensors doesn't solve the problem. Manipulating becomes marginally more difficult with three sensors, but it's still very possible, and with enough monetary incentive it's still even likely that it happens again.
So why not 5 sensors? How about 10?
And what about more consequential issues like the toppling of governments or military blockades where true redundancy is impossible and people are actually harmed?
Is there not a point where you start to blame the incentives that are being chased?