Well, every soldier should be a somewhat competent infantryman, just as “every Marine a rifleman” as is their motto, but you must admit that you won’t be as good an infantryman as someone who spends all their time training in it, just as I wouldn’t either.
This incident is what drove a shift in training to get the "soft skills" more ready for ground combat. Prior to that the mentality was "I'm not Infantry, so why should I care?"
It got better, but it still has a long way to go. I just participated in some basic squad-level training with intelligence Soldiers, and it was painful.
I did enough “Infantry” functions to know to clean my weapon so it wouldn’t jam, and be proficient enough that I could fire it if needed.
What do they teach in Basic Training now?