They are not touching original CI process, they are only modifying their own SSH session. And they want to run CI commands from manual SSH process, so taking P

They are not touching original CI process, they are only modifying their own SSH session. And they want to run CI commands from manual SSH process, so taking PATH (and everything else) from the original CI process is exactly what they want -- this is all part of the game for SSH process to be a real "CI" runner.