Well that's cuz you might be talking with multiple people who have multiple opinions??Air power means nothing against insurgencies with reliable overland resupply from outside powers and/or nearly unlimited room to retreat. There really is not any historical precedent for a COIN operation of this scale being done in an area so small and blocked off as Gaza. I would strongly recommend against making comparisons to things like Vietnam or Afghanistan until at least a few weeks after the operation has started.
Many people accuse the Israel leadership of hot headed decision making, which I think has some basis. However, I do not understand how many of these same people then chastise the IDF for not having already rushed in within days of the attack. Is it bad to rush in like Lebanon, or is it bad to wait and set up sustainment infrastructure and a viable plan before going in? It can't be both.
Waiting is obviously much smarter than rushing in and ending up like the Robotino bois.
As I've stated before, ideally for Israel, they just deescalate without an invasion. Israelis are understandably angry due to the acts of war committed on them. By now having killed x amount of Palestinians, revenge can be declared and the status quo can be resumed. But to invade Palestine in force, will immediately trigger a bigger war, and trying to hide behind US is an excellent way for Israel's enemies to start getting very powerful equipment and intel.
Remains to see what Israel will do.