An antitank weapon is 6-120 lbs of propulsion, controller and warhead. It costs between a thousand and tens of thousands of dollars per weapon.
Economics refutes you.
I think you should watch Chieftains video and read some military theory. Simply being vulnerable to less expensive weapon systems does not make a unit/vehicle/soldier useless or obsolete.
That said... I think the niche the tank occupies right now is getting a LOT smaller.
Infantry screening is no longer enough. It's not just manpads and other anti-tank weaponry coming in from close quarters... it's gps guided missiles dropping on the tank from drones miles above.
We're definitely still going to see ground vehicles play an important part in combat, but I strongly suspect it's going to move back towards favoring nimble vehicles with specific utility. Not the current style of armored tanks.
Spears and catapults and bows make your soldiers effective dozens of yards away from the enemy.
Rifles get your soldiers to a hundred, sometimes two hundred yards away.
Artillery and drones make your soldiers effective up to a few miles away.
The further away you can keep your soldiers while accomplishing your goals, the better.
There is a balance here. Sometimes you have to risk the human.
https://news.clearancejobs.com/2022/04/26/managing-the-dod-s...