Like most HEAT launchers, the sturmp requires more than one shot, which, arguably of course, makes it’s TTK a lot longer than an explosion pack ( seeing as it often one-hit-kills german tanks).
I’d also argue that the sturmp’s sights are atrocious,
combined with the arcing of the projectile, making the range advantage really finicky.
You feel they were taken out the most because you are more likely to remember the frustrated time when you want to call artillery or use at weapon but find out that the person had died. If an engineer died in engineer squad you will simply ignore it since you can simply switch to other engineer in the squad.
But if you have only have one engineer on the squad then you will remember the time when the engineer was killed just like at soldier and radioman.
So I will say people focus attack on at soldier is mostly an illusion.
You’d be correct that one would notice it more often, if he only is limited to one of such specialist, however it’s not a matter of squad in this case, rather the faction.
I run the same squad set-ups across the three factions - US, Soviets and GE. All have same squad rotation and there’s no uniform differentiation across each member.
Statistically speaking, if the squad is engaged (player is not present to pose as a priority target), the AT is most of the time the 1st or 2nd to get killed when in the US/Soviet squad, since those have only Launchers/Rifles.
The GE squad with Sturmpistole AT does not suffer this effect. The AT being taken out is often a case of pure luck chance, since as I’ve shown, there’s no way to tell it apart from the other squad members.
Feel free to try it yourself. I’ll look into it myself a little more since you insist on it being negligible and try to put it into actual statistic, despite the headache it will be.