That's the thing, I was careful about my wording; "if their only intention is to step up to a higher object". If I tell someone to get on top of a cement block, their impulse won't be to do a parkour jump where they're tucking their legs, they'll likely use their hands to lift themselves up. They wouldn't even think of their action as a "jump". When people press the spacebar in a video game, the intent is clearly to get higher onto the thing in front of them, it's just most games choose not to express the particular actions a human does to do that (much like how we dropped Tomb Raider's approach of manually holding a button to grab onto ledges)

In DRG, the way they differentiate intention is with the direction you're looking - you can only mantle onto platforms you're looking towards. So, you wouldn't get many occasions where you're dodging sideways and accidentally get on a platform.

In DOOM Eternal, they got rid of crouch, and put the grenade launcher on there. G was changed to toggle between your two grenade types. In Deep Rock Galactic, Ctrl uses the player's laser pointer, a tool for communicating to teammates that doesn't really impact gameplay. Having a free keybind offers a number of ways to enhance or simplify the game; if they wanted to go for simple measures, it could be a context-sensitive VO button, like spotting out enemy players.