Why is that guy breaking trigger discipline on a propaganda poster?
I think the reason tends to be that the people involved in prop and photo ops actually have no clue about the particulars and just want it to look cool. It's equivalent to "why is X in movies always so unrealistic?" for various values of X (e.g. hacking, law & courts, guns, etc)
(By people involved I mean the people taking the pictures, editing, publishing, etc. Though in the US captain one, I guess also the guy in the picture too)
https://www.npr.org/2024/09/04/nx-s1-5100305/navy-commander-...
Hmm not enough details to say whether it was due to the incident or something else.
I will choose to believe it was because of the backwards rifle thing though because that's hilarious
https://www.ozon.ru/product/poster-100-na-65-sm-plakat-voenn...
or another https://stihi.ru/pics/2024/06/14/4714.jpg (and if it reminds you something with 4-limbed symbol from 80+ years ago - it isn't an accident, it is the nature of the current regime in Russia)
While it sounds like a pun, there is no "trigger discipline" in Russia (I myself an ROTC officer). In USSR/Russia the "never point your barrel at anybody or anything" discipline has been taught instead.
Even military guards on duty are by the military regulations explicitly prohibited from chambering their weapon until necessary:
209. Часовому запрещается: ..., досылать без необходимости патрон в патронник, ...
and only when the guarded security perimeter is about to be breached and the guard has already issued 2 verbal warnings, only then the guard chambers the round and makes the first warning shot toward the sky:
211. ... Если нарушитель после предупреждения "Стой, стрелять буду" продолжает движение, часовой досылает патрон в патронник и производит предупредительный выстрел вверх.