IDF has stated around 13K Hamas fighters killed. Hamas says 32K civilians killed. Both are probably inflated.
As for an airstrike vs a raid - OBL was in a compound and never left. It was a static target. They didn't drop a JDAM on it because it was in Pakistan. We were not supposed to be in there or cross the border. That's how he escaped the first time at the battle of Tora Bora. If you watch the movie or read the book, that was the reason for the modified, stealth helicopters. The other big reason was DNA confirmation was needed.
This is more akin to the Battle of Fallujah (1 & 2) where the US basically leveled the entire city and inflicted tens of thousands of civilian casualties. Neither the US or Israel did/is doing even a halfway decent job of distinguishing friend from foe and in both cases soldiers embed themselves extremely well in populated areas. It's clumsy and crude and if you go house by house, can take months if not years to clear a city. I think it was Chris Kyle talking about how the Marines used tanks at point blank range on buildings. If they were getting shot at, regardless of who was in there, that building was gone.
Every urban battle turns the city into rubble and grinds the civilians into dust. Look at what's happening in Ukraine now, Russia can't ferret them out, so they just fuck it and level everything. The Balkans, Hue, Stalingrad. More recently Mosul. Historically the ratio of civilian casualties to soldiers is 9:1. That's not a justification, just that urban conflict when a portion of the population won't evacuate is a no-win situation for everyone. With all the tunnels, drones won't really work.