You could say it the other way around - once the tank stocks are depleted, anti-tank weapons can still play a devastating role (against other armored or unarmored vehicles).
The US Defense Dept. has said it will take at least ten years to rebuild the stock of anti-tank weapons that have been used in Ukraine in the last five months.
I don't disagree with your overall comment, but note the modern main battle tank is a really complex beast, both in sensors, gun control, and also defensive systems. Even Russian tanks are very complex (their current high losses notwithstanding), but Western tanks are incredibly complex. They are not meant to sustain heavy losses, they are designed to survive.
If modern weapons strongly reduce the survivability of tanks, at least the future of Western tanks may be in question.
That said, drones cannot replace tanks. Maybe something else will, but drones cannot make breakthrough advances, nor accompany and shield advancing infantry. Drones may be cheap tank killers, but I don't think they can replace tanks.
Even an evolution of the tank's role, because all roles change, will not be fulfilled by drones.
If a meeting was called of 10 big tech/manufacturing companies and they were each told they'd be hansomely rewarded if they managed to make large volumes of a missile design, and that all IP/Patent laws would be suspended for the purpose, I guarantee you that there would be massive stockpiles within the month.
[34] https://www.stlouisfed.org/on-the-economy/2020/february/war-...
If we actually needed infantry anti-tank weapons, I don’t think we have any problem building them in huge quantities.
https://www.oryxspioenkop.com/2022/02/attack-on-europe-docum...
Reponding to this and some of your other comments elsewhere... These anti-tank weapons may be the best anti-tank weapons, but they're not the only ones. If all of these are used, there are plenty of other ways to destroy tanks, so it's important, but not required to have a large stock of them.
You could probably increase the rate of manufacture of these, but there's also value in having ten continuous years of manufacturing instead of long time periods between batches.
I may be overly cynical, but in some ways, this war seems like a warehouse clearance event. It seems like everyone is finding their old stockpiles of Soviet era equipment and sending it to Ukraine to be used and/or destroyed. And presumably afterwards, it'll be time for the military industrial complexes to turn back on and build new stockpiles. Add in a few field demos of new equipment too.