Correlli Barnett's Swordbearers and sea power

How should readers assess Correlli Barnett's Swordbearers as a leadership book?

Its land-command insights can be useful, but naval command differs because fleets cannot always force an enemy to accept battle.

Some of Barnett's observations on land command are valuable, but naval command faces a different basic problem: an enemy fleet cannot always be compelled to fight. A land commander may force contact through geography in ways a sea commander cannot. This makes sea control, deterrence, and strategic choice central to naval analysis.