The SteamDRM wrapper tool itself, freely distributed through the Stramworks SDK, used to straight up ship with a feature to strip the DRM from any exe.
It's not silly, for many types of games, having access to privileged information on the client is simply a necessity. Any multiplayer FPS client will have to know the positions of other players before they come into view for latency reasons. The client will have to know exact origin points of any sounds other players might make. Player models fully occluded by transparency effects will still have to be rendered and cheaters could just forgo the transparency pass all together. Same story with things like overlay effects and postprocessing (flash bangs, blurry vision, b&w image, ...). Texture changes can give a visibility advantage. The list goes on and on. Developers rely on client-side AC out of necessity, not out of ignorance.