Why support for unrotated projectiles survived failure

Why did support for unrotated-projectile launchers continue after reported failures on Hood?

Churchill and other advocates remained committed to the aerial-minefield concept.

Reported failures aboard Hood did not end support for shipboard 20-barrel unrotated-projectile launchers. Several enthusiastic supporters remained committed to the aerial-minefield concept, with Churchill prominent among them. A recent exhibition proposal involving cheap drones carrying nets or possibly grenades provides an anecdotal comparison. Its premise was that cheap drones could obstruct and defeat more expensive ones. A later clarification distinguishes this proposal from loitering anti-aircraft munitions. Another recalled proposal fitted a small drone with a rocket launcher for use against other drones. The comparison shows how an old concept can return in a different technical form, without demonstrating that either system was effective.