It is a disservice to muddy the waters that way every time any weather event is discussed. Yes, there might have been worse floodings about 5000 years ago. Yes, one single event cannot be attributed to climate change and freak monsoons happen from time to time. But we are very confident about the magnitude and frequency of these events being a direct consequence of global warming. Climate change and these events overall are direct consequences of global warming. There is no “yeah but”.
We also know for a fact that global warning is directly responsible for the increase in melt water from receding glaciers, which was a contributor to the floods in Pakistan. It’s completely wrong to say that this would have happened without global warming.
It’s like the discussions about the heat wave in Europe. You’d think people would get the message when 8 of the warmest years on record happened in the last 10 years.