Seems like everyone is forgetting that unlike flying, you can always simply stop taxiing and take a minute to double check, look outside, confirm with ATC, etc.
Taxiing is not rocket science and it's most certainly not as scary or dangerous as some make it out to be.
Sure the captain has the final responsibility, but with an attitude like "it's my career on the line" I fail to understand how some people on here even feel comfortable with allowing their FO to operate their own seat belt, god forbid he should do it wrong and fall out of his seat, while being under my authority and me being responsible for the crew and all.
Taxiing is part of operating the aircraft, both pilots are type rated on the aircraft, therefore both should be capable of operating the aircraft. Taxiing is not dangerous, it's not scary, it can be tricky but you have your brakes and CRM for that.