This is about cost people....., the RHS tiller is an option just like having two fueling panels and many other equipment where you will find differences.
What is the big deal about letting the F/O taxi the airplane? I've flown on companies that have this procedure for decades and it has never been a problem. What are you "let the F/O taxi and you are asking for trouble crowd" compensating for?
You know that even if you taxi all the time it won't grow anymore right?
