This will make it easier to aim/look around before quickly switching to build mode as it won’t require you to remove your thumb from the Right Thumbstick to do both.
To combat this, you can adjust your hand position – keep your finger hovering above the build button instead of the right thumb when you aren’t actually looking around/aiming at someone – or you could change your Crouch/Slide button (clicking the right stick) to your Toggle Build button and vice versa. This will make it easier to aim/look around before quickly switching to build mode as it won’t require you to remove your thumb from the Right Thumbstick to do both.