- But also humans can do more things in space or on the Moon than robots can.
Yes, piss! Thanks for telling me. But the Mercury-Atlas8 space craft didn't have a toilet. John Glenn & Co had to piss in their trousers.
You've got I one track mind. I wonder why? You should either head off to either a urologist or more likely a psychiatrist.
But you're showing your ignorance again! John Glenn & Co didn't have "to piss in their trousers . . . the Mercury-Atlas8 space craft".
- John Glenn didn't fly in "the Mercury-Atlas8 space craft" so no problem.
- And the "and Co", Walter M. Schirra Jr., didn't have "to piss in
their his trousers" either!
So you're certainly maintaining your enviable 100% record - always wrong, Congratulations 
!
Yes, we are told that once in orbit, the Mercury spacecraft could be rotated in yaw, pitch, and roll along its longitudinal axis (roll), left to right from the astronaut's point of view (yaw), and up or down (pitch). Movement was created by rocket-propelled thrusters, which used hydrogen peroxide as a fuel. For orientation, the pilot could look through the window in front of him or he could look at a screen connected to a periscope with a camera which could be turned 360°.
The Mercury astronauts had taken part in the development of their spacecraft, and insisted that manual control, and a window, be elements of its design. As a result, spacecraft movement and other functions could be controlled three ways: remotely from the ground when passing over a ground station, automatically guided by onboard instruments, or manually by the astronaut, who could replace or override the two other methods. Experience validated the astronauts' insistence on manual controls.
I always wonder who wrote this nonsense. Nobody ever flow in a Mercury spacecraft. It was all Fake News!