Jesus never spoke in tongues or imposed a dress code. He did, however, physically impart His Spirit upon the Apostles and charge them to implement His Sacraments.
If sacraments aren't important, I can see discounting Apostolic succession. But you can't have one without he other. How does one have this power if it is not given?
SD
Of course the Sacraments (however many of them there are) are important. But in the Lutheran tradition, the clergy is called by the holy spirit directly, not by a bishop (an office which doesn't exist in my denomination).