Implementing a send everything to camp button and item multiselection must also be insanely hard and "experimental" for a 2020 PC game. Don't forget this is a game that can't even pause in ESC menu screen. Definitely AAA vibes.
But that's not DnD. There's no "send everything to camp" option in 5e rules. It's amazing how fast you'll sweep that argument under the carpet, isn't it?
Oh please, straw is flying everywhere now... that has nothing to do with the rules system that governs character/world interactions, we're talking modern day video game conveniences, that's like complaining the game's UI doesn't adhere to pen an paper rules. If you wanna go at it like that, then the whole camp machanic is BS to begin with... and it wouldn't be the only one.