Actually i think that both generalization and specialization are required.One can not stick on one particular things because in today's era you should be known all the basic things about any subject.If we take one example that person occurs some symptoms on his skin then we first go to the physician not to a surgeon.
In our daily life both the things are necessary.In the point of Generalization we should be in above average in all stuff.Why because we cant help our life style being as specialization.If Person is specialist in accounting or family budget planning then remaining things like family events and spirituality goes dump.
In point of specialization we cant help our business and profession being generalization,Why because little bit knowledge will not serve any purpose in that particular era.So, we need specialist in that area.