GMforPowergamers
Legend
Not necessarily. Subclasses have the same power list and meet the same prereqs as the 'base' class (so a Mage IS a Wizard for all rules purposes). However, a subclass doesn't have all the class features (or actually any of them by default) of the base class. In fact as of now there is technically no such thing as a character that is just a 'Wizard', you would be a Wizard (Arcanist), or a Wizard (Mage), or a Wizard (Bladesinger). Since proficiency with implements is a class feature Bladesinger doesn't 'inherit' any implement proficiencies from Wizard, because Wizard is now an empty shell class that has no class features (they all belong to Arcanist now).
I was afraid of that...I was just told my wizard (arcanist) has to take a feat for the tomb becuse it is not an (arcanist) but wizard...