Using C to crouch means you have to move your finger off WASD which hinders mobility. I can easily keep shift pressed with the tip of my pinky and use the base of my pinky finger to press CTRL at the same time, and then slap space bar with my thumb to jump while keeping total control over WASD.
That's pretty much mandatory in parkour-heavy games like Warframe where you run, crouch and jump all the time.
It's also more ergonomic and comfortable because my relaxed hand posture is right above those keys. Getting to C requires an awkward movement of either my index finger or thumb.
Using C to crouch means you have to move your finger off WASD which hinders mobility. I can easily keep shift pressed with the tip of my pinky and use the base of my pinky finger to press CTRL at the same time, and then slap space bar with my thumb to jump while keeping total control over WASD.
That's pretty much mandatory in parkour-heavy games like Warframe where you run, crouch and jump all the time.
It's also more ergonomic and comfortable because my relaxed hand posture is right above those keys. Getting to C requires an awkward movement of either my index finger or thumb.