Conventional war in which dog-fights occur is only likely between enemies of more or less equal strength. When there is a huge disparity in military capabilities, warfare is conducted by means of guerilla warfare (aka "5th column", "terrorist"). This type of warfare is thus developed and used by weaker nations (and factions), while the powerful nations try to develop defences against it rather than employing such tactics themselves to any great extent. Increasing your firepower gives you no advantage whatsoever against someone leaving a bomb at a power station or dam wall, or pouring poison into your water supplies etc.