Valencia registers about 50 deaths by car accident per year, 1/3 of the deaths that the floods caused in the city. If you look at Spain as a whole, car deaths per year are much, much higher. Depending on how long it takes roads to unblock and cars to be replaced, this may in total be a win for human lives...
Its black humor, not cheering the deaths of people. It's pointing out that we've been warning the world for years that exactly this will happen, and now it has in a way that resembles a system correcting itself. There's no joy in hilighting this, just ironic tragedy and the laughter of the gallows.
"I will shed no tears for any car owner killed in this disaster. They got what they deserved. For everyone else, I wish I knew where to donate toward any relief funds.” -- SatouKazuma@lemmy.world