This is just the gender fraction among the working age casualties of the bombing campaign. Men are more likely to be outside the home. Israel has been targeting all the infrastructure they can, including hospitals, schools, emergency services, etc.

Think about how societies would act when under constant bombardment. You still need to find a way to support yourself. The proverbial rent doesn't stop just because of the war. Especially in more traditional societies, you would likely see men doing most of the work outside the home, while women stay in whatever place is safest with the children. The wife stays back in the half collapsed building, while the husband goes to risk the crowds, riots, and potential machine gun fire at the aid trucks.

What war in history hasn't seen the male population, even the civilian population, be placed at a higher risk of direct violence than the female population? Especially in more traditional societies, men will be highly likely to place their wives and children in the safest places they can find, while they go and take on a disproportionate share of the risk of leaving relative safety.

And for their sacrifice and bravery, the men of Gaza are rewarded by being slandered. Are you a male of working age killed by an Israeli bomb? You are assumed to be a member of Hamas.