The Apache is not fragile it could take more bullets than any fixed wing aircraft besides an A-10. So out of the thousands of flying things in the world the Apache is number 2 least fragile. So you calling all helicopters fragile is 100% incorrect.
The Apache is invisible to ground based radar as the radar is line of sight. Someone who watched the latest Maverick movie could tell you that. So saying it has gigantic radar signature is 100% incorrect.
The Apache is the most survivable platform on the battlefield besides the F-35.
This is 100% just your unproven opinion. You should label it as such.
All helicopters are more or less fragile. The struts and joints in a rotorhead are all single points of failure.
Line of sight is established before the helicopter can fire its weapons. As mentioned, in my career as AAA radar operator helicopters were always easy targets. Ground based radars in most terrains see them from their maximum range coming in. Vegetation e.g. does not cover their huge radar signature. Here helicopters are flying ultra low over a motorway hoping
, the clutter from the moving cars would cover the echos from their helicopter.
You say that the Karbala operation was a single mishap. Can you tell about a single succesful operation of attack helicopters over urban areas? Among the reason why they failed, was "because the fighter bombers had left the area", which means that helicopters on their own are vulnerable.
After the disaster, "Attack helicopters would henceforth be used to reveal the location of enemy troops, allowing them to be destroyed by artillery and air strikes.", which means the attack helicopters were degraded to Kiowa-type of operations.
In this interview
, Thomas White said "You know if you have a helicopter flying directly overhead, an AK-47 or just about any weapon will do the trick.". That is what I call fragile. This means, that helicopters simply just stay outside of regions where people are shooting.