Biden called it “Ten 9/11s” because of percent of population. I would have called it “0.47 9/11s”, as each human life is equally valid. But as impact on the whole, Oct 7th was a larger percent of the population of the country than 9/11, so it is having a much larger impact with only half as many dead.
I also hope that the numbers that die in retaliation are as low as possible, and percent population numbers gave a smaller needed “revenge” killing. Wish it was zero, but we are, underneath it all, rage-full apes with explosives.