Sadly, I have to agree with the pessimistic side here. The only reason I'd truly field a Defender is to use the cannon slot with a small base ship. A naked defender (even a named one) doesn't justify its cost. IMO, FFG vastly overrated the White 4K, and made the ship pay too much for it (dial, actions, cost).
Other pilots in the game also have the ability to take actions before or after a K-turn, or directly ignore/shed the stress from it and they don't pay such high prices for that ability.
When you put it that way Keyan Farlander with AS is 32 points and can K turn all game long without losing an action.