While tanks are still necessary, your observations are not wrong - the US Marine Corps decided to get rid of tanks fairly recently:

https://www.marinecorpstimes.com/flashpoints/2020/03/26/the-...

Quite prescient considering what we are seeing in Ukraine a couple years later with tanks being vulnerable especially when deployed so haphazardly by Russian Federation.

Bottom line - war games in 2018 showed that tanks and other armored vehicles in-range of near-peer drones, Anti-tank guided missiles (ATGMs) and Precision Guided Munitions (PGMs) were quite vulnerable - exactly like we're seeing in Ukraine.

There were other factors but the top marine decided no more tank battalions and greatly reduced artillery (among other changes).

Instead, these divestitures will be replaced by:

1. Precision long range fires (Naval Strike Missile\Joint Strike Missile (NSM\JSM), and possibly Extended Range Cannon Artillery (ERCA))

2. Unmanned lethal air and ground systems.

That tells you what the war games revealed as being effective in future combat.