Why Jeune Ecole was doctrine rather than strategy

The Jeune Ecole offered a doctrine: use numerous cheap systems to offset an opponent's costly platforms. It did not by itself explain the whole conduct of a war in the way a broader economic-warfare strategy might. Small craft could impose risk and complement major units, but they could not reliably fight the full-length fleet action alone. The decisive weakness came when France treated the inexpensive counter as a total substitute for balanced naval power.