18 and 19 year olds to be 'tough soldats,' place them in an area where the "local fauna" can be problematic if not outright hostile -- and then rather foolishly IMO expect them to be gregarious social networkers with said fauna -- who speak in another tongue and obviously won't say in English what they are saying in the local dialect. A few US Troopies can and will do that -- most will not...

Not likely to change. Not with the kids nor their NCOs. The NCOs live by these rules among others:
16. Don't drop your guard.
18. Watch their hands. Hands kill. (In God we trust. Everyone else, keep your hands where I can see them).
21. Be polite. Be professional. But, have a plan to kill everyone you meet.
22. Be courteous to everyone, friendly to no one.
and the kids who stay alive tend to develop in their image. As they should...

Most officers will bend to do the necessary socialization it but even many of them will not and most that do won't really like it. There's a reason for the existence of MI and CA folks. There's an even greater reason we organized, developed and trained Special Forces the way we do -- or did. The relative maturity and cultural / language training is only a part of it.

The GPF is good at the job for which it is recruited, equipped, organized and trained. It can and will accept cross training to perform marginally in the FID or other role but it will never excel at that role. Nor should it.

Moral of that is do not use the wrong tool for the job and then complain about the unsuitability of the tool...