That’s why you drop APC’s. They can kill tanks with ATGM’s while fighting ground troops and air assets.
Modern tank active protection systems make that a lot harder, as recent events in Chechnya and Lebanon have shown, not to mention Syria. Modern APS means you have to saturation attack a tank so protected now. The Chechens reported that it could take 7-10 or more launches with vehicle- or stand-mounted ATGM to take out an Arena-protected Russian tank.
Here’s Arena taking out an RPG on a range:
https://www.youtube.com/watch?v=vMY0p_2KrYg
Merkava 4s with the Israeli Trophy APS taking out ATGMs and RPGs in combat.
https://www.youtube.com/watch?v=SQA4ecTD8wk
Given how effective these systems have proven in real world combat and given how effective Russian Kornet missiles are proving this year and even now in raping Turkish Leopard 2s in Syria, there’s no question as to why the US Army finally ordered Trophy for the Abrams this year instead of continuing to wait for the vaporware Raytheon Quick Kill system.