I'm still waiting to see cas or artillery in the ME universe, but so far all I've seen is some drones.
So tell me then, if you end up being ambushed like Ashleys squad in ME 1 do you just stay where you are, calmly call for support and then bleed out on the ground or do you move? And if the only way out is through the enemy, what do you do then? Surrender, even if your unit has been assigned a critical mission that the rest of the force is depending on, like sighting the artillery to keep from blowing up their own men?
It's impossible to predict every variable of a battle field, so to say that there is no circumstance where attacking into the enemy is the best option would be a bit shortsighted. My original point was solely that the kinetic barrier would give the infantryman a greater chance of survival in such a charge because one shot doses not equal death, hell he could just drop when his shield flair then pop up behind the line allowing the shield to recharge by the time he ends up back at the front as those infront did the same, cycling through the ranks while minimizing casualties and advancing on the enemy. Are there better options, yes, but they are not always handy or timely, make do or do without as the saying goes. I'm sure Shepard could have handled Torfan better, instead the mission was accomplished and 3/4 or his/her troops died in the process, sometimes results are all the commanders care about.
Look at Thessia. Look at any time you face opponents who send a gunship after you. Look at the lore. These all clearly exist, even if they aren't depicted. You can't say it doesn't exist based on your own ignorance.
You've just created an impure scenario that is very specific with its limitations on me. That's not a valid utility of argument. This point is invalidated.
And you've directly misinterpreted my statement. I know this. Much better than you, having been in combat situations myself. I did not say that attacking the enemy is not a good strategy. I said charging the enemy when they have the advantage of firepower and position is not a good strategy. Especially when that charge involves 1) making yourself a large, loud, and linear-moving target, 2) having little to no defensive capability beyond a barrier that is already strained from getting involved in a senseless firefight, and 3) not bothering to do anything to support your charge, such as no artillery, support by fire, returning fire.
That wouldn't work practically, as having to move would mean having to again expose yourself to open fire (without cover) and hiding in an obvious position. It's not concealment, it's cover. And the enemy is whittling away at it, while your buddy is also losing his shields from fire. Soon, he's gonna have no shields, and you're gonna have no cover. That's why this strategy is irrevocably flawed.
And there is always a handier and timelier solution; disengage, blow them up, or not engage in the first place. The very fact that you've put yourself in this position shows that you don't have any business being on the battlefield at all. As I've said, you're trying to create a highly specific scenario to justify an action that is basically useless.