There exists a sensible way to handle this. It is to require at least three independent news outlet reports of an event (as defined in the bet).
A related issue is that war news is heavily censored in Israel; it's difficult for news outlets to report it.
It's also hard to have 3 independent outlets report on all the thing.s This seems like a small story that only some people in Polymarket cared about I guess? It's not like 3 different news outlets were calling authorities to confirm what really happened here. It wasn't big enough to deserve more than 1 journalist going to the source and doing all this work.