You could also argue loot crates are just the digital version of Pokémon card packs

You could, but that doesn't make /either/ an acceptable to market towards kids.

Yeah, because that would be like selling packs of baseball cards to kids with enticements like chewing gum, a practice that was outlawed in the United States in the 1950's.

Eh, Topps did in the 1950s and The American Tobacco company did it in 1909.