In detail:
Infantry Carriers
1. Understanding Terrain for MOBILITY
Vehicles over 20 tons even tracked ones cannot go through closed terrain like light tracks/tanks can ie; M113 Gavins etc..
The Bradley at 33 to 36 tons is too heavy and is restricted to open terrain
So you don't want medium-weight tracks for a 3D maneuver force because of their drawbacks on the earth---even if you can find an aircraft combination to move them.
SIDEBAR on PROTECTION: medium heavy doesn't mean it better protected.
You can up-armor a M113 Gavin and get a better protected vehicle than the inefficient, poor design lay-out Bradley which is armoring dead air and has internal fuel tankage compromising the point of armor layering
2. Understanding propulsion for MOBILITY
Wheeled armored cars like the AMX-10RC or LAV3Strykers cannot go cross-country over open terrain without risk of getting stuck and are useless in closed terrains. They are easily ambushed, road-bound deathtraps.
So you don't want wheels at all.
3. Understanding light tanks for FIREPOWER
Think.
If the U.S. Army light infantry egomaniacs had valued infantry fire support tanks they WOULD HAVE KEPT USING THEM IN SOME MANNER AFTER WW2 AND IMPROVED ON THEM.
Even a M22 Locust light tank with turret removed would have been air-transportable under a C-54 to reach South Korea and once there, YOU REATTACH 106mm RECOILLESS RIFLES to become a defactor Ontos that kills T34/85s and stops the North Korean advance and TF Smith changes from truck and foot-slogging victims to victors...
General Gavin got it. He was an infantryman. He wrote about it, too:
AIRBORNE WARFARE: AN INTER-ACTIVE EXAMINATION
And he was hopping mad about the Korean FUBAR:
General Gavin asks where is the Cavalry in 1954? We ask where is it TODAY?
4. Understanding the sociological reasons for military incompetence
The problem is the narcissism of the weak ego populated U.S. military that breeds ignorance and incompetence. Its time we face this cultural defect and get rid of it instead of trying to work around it---which doesn't work.
Mike