A plane cam fall from the sky and kill you at any moment but we don't go around acting as if it is a reasonably expected event.
In the same way that yes the entire bitcoin code can be changed. But it...
Sure we've been through a fork war before I was fortunate enough to have an address with some BCH allocated to it, lol not that I knew wtf I was doing at the time lol but it doesn't mean something like this wouldn't seriously rock the market, theres massive holders with paper hands in the game now the entire spot ETF allocation as an example, it would be complete and total madness as the market tries to figure out how to price the two forks