Just to clarify from my previous post... I am perfectly happy for the FO to taxi, but I will not be distracted from watching proceedings, and not doing checklists or engine starts/shutdowns etc.
The argument about landing vs taxiing is irrelevant, as during landing the Captain is focused on the flying, and ready to take over, whereas during taxi, SOPs may have him doing other duties.
How many airlines have the same wind/xwind limits for Both crew?
The day the laws change to say an FO landing or taxiing is totally and solely responsible for any incident, (not the Captain) then life becomes much simpler!