A captain should always be tuned into what the FO is doing and once I took over when the FO went to idle power at 50 ft to not put the gear through the wing because he was also slow. Adding power and flaring was very easy so going around made no sense. SOP's sometimes require procedures that make no sense but we didn't have one for that. Come to think of it we had very few SOP's until the big guys bought us.