WW2 was a classic example. Every nation except the US still had bolt-action rifles as the standard infantry weapon, on the belief that giving every infantryman semi-auto was a waste of ammo/too expensive/too heavy on logistics. Also motorization was not appreciated until late in the war, even in the German army - which despite all the attention devoted to the panzer/panzergrenadier divisions, was maybe 20% motorized at its peak. Mostly their soldiers marched from place to place, or used rail.
There is kinda a reason for this, that there are counter examples were new tech wasn't all it was hyped to be. And until something is battle tested, its hard to say how it would perform. Like early in the Vietnam war, US infantrymen may have been better off with the old M1 garand, because early models of the M16 tended to jam in combat conditions.
> anyone who was ever made to look foolish saying[...]
These are common throwaway sayings people with no concept of resources and an overly active aversion to risk often use.
The reality of the situation is that nobody cares to invest in some insanely expensive and vulnerable platform to hijack drones, because 1. it will probably get taken out by a drone 2. it would cost orders of magnitude more than all of the drones and personnel it would take out.
Furthermore, nobody would care to truly protect against such a counter, because the drones cost absolutely nothing.
Saying "it's improbable but let's prepare anyway" isn't how the real world works. Look around you - the world is absolutely filled to the brim with problems, even ones quite probable, even ones inevitable, that nobody can or is willing to spare the resources to deal with. As a general rule, preparing for the improbable is a poor path to success, and worse still is preparing for the improbable, where the improbable event doesn't even impact you in any serious way.
Also, ofc you don't hear about those people. Nobody is reporting on the non-event or the people who prepared for the non-event. Pure selection bias.
[1] https://williamaarkin.files.wordpress.com/2012/02/arkins-con...