The reason you are being compared to David is because everyone on this board has already explained to you multiple times how and why this situation is completely out of Kaiden/Ashley's control. Yet you want to go around and around in circles about how accidents are unacceptable and thus it is clearly incompetence..
I also believe you are completely misinterpreted the sniper comparison. From what I can tell They were asking if and innocent civilian was killed by a sniper in a place they would not expect to be snipers, would you say it was incompetent of them to be at that location with out any real way of knowing otherwise. Which would work in this situation seeing as at no time is there any indication that the beacon has any sort of proximity detection or that it is dangerous in any real way. I mean Wasn't the beacon just recently dug up before that?
How about this in a military setting, if your squad was sent on a mission to retrieve an unknown artifact and upon arriving and setting up a perimeter around said artifact, it began to do exactly what the beacon on Eden prime did dragging you and your crew near. Who exactly would be at fault?
No one has explained to me how the situation is objectively completely out of their control. They're explaining what they see, and I'm expressing skepticism and explaining what I see is different and why. This point on yours specifically is what I'd argue as misinformed and malevolent belligerence towards me. You've improperly biased your statement against me personally.
The analogy doesn't work, because the victim (Kaidan or Ashley) knows that the sniper (the beacon) is there, and is being reckless by walking towards it (after Ashley says that it's doing something that it wasn't doing earlier). It's doing something that it wasn't doing before Saren came. I'm going to expect caution and discretion from my Soldiers. I'm going to expect them to not go towards the beacon without authorization. I shouldn't be telling them not to check it out? It should already be a given that, unless I authorize otherwise, don't go near the sensitive artifact that this entire mission is about. Especially when it's not behaving in the way that it normally did.
First, I would assess any casualties or injuries. Second, I would collect a report from all my squad leaders about what each Soldier did in this case, what they saw, what they were doing. I would be making a report, stipulating exactly what, to the best of reconstruction possible, what exactly happened; If the artifact activated on its own, it would be blameless. If it was clearly due to recklessness or unauthorized actions, I would punish the Soldier(s) responsible. The severity of said punishment would depend on the consequences of the activation, and the actions and behavior of the Soldier(s) that led to the artifacts activation.