This is correct. All pistol shooters just wear shirts. All of them have their hand in their pocket. If you don't have astigmatism you can get away without the fancy eyeglass holder, and just use regular glasses. The lack of blinder is somewhat impressive, because most people will get a headache after too long without an opaque blinder on the off eye.
Meanwhile in rifle it's all $2k kit of rigid jacket and pants. If you aren't using the rigid jacket and pants, you will get absolutely wrecked. Your score will be lower, and your back will get injured in the long run because of the contortionist posting when holding the 13 pound rifle up for hours. It's not possible to be competitive without it.
Though in that specific case, I'm pretty sure she's got part of the hand in the pocket, and that shooter Kim Yeji also does hand in pocket other times, if you've seen her at other issf events (here's a random example):
I've also done finger through belt loop, it's basically the same thing. (Guess it wasn't technically a belt loop, but like a utility holder loop, like you'd put a small hammer in on the side of work pants?)
An analogy would be if there was a big news cycle about programmers and people were really shocked about a specific programmer usinv a "text editor", and people went on and on about how that was... except all the other programmers are sitting over there thinking "wait, every programmer uses text editors".
Sure you can find a few that don't, but that's real missing the point.
Meanwhile in rifle it's all $2k kit of rigid jacket and pants. If you aren't using the rigid jacket and pants, you will get absolutely wrecked. Your score will be lower, and your back will get injured in the long run because of the contortionist posting when holding the 13 pound rifle up for hours. It's not possible to be competitive without it.