Cutting the Taliban finances

NY Times:

U.S. Airstrikes in Afghanistan Take Aim at Taliban Opium Labs

The airstrikes are part of what is expected to be a sustained campaign targeting a lucrative source of funding for the Taliban.

Why has it taken over sixteen years to start attacking the Taliban's main source of revenue?  I suspect there was some element of political correctness.  It is another example of how the US has pulled its punches in dealing with the enemy in Afghanistan.