Always wondered why these weren't destroyed.
From what I could gather, the problem was two fold.
Firstly, it was in the interests of the Taliban to persuade (or compel, or coerce) farmers to grow opium, - actually, cultivate poppies - both for commercial reasons, (they made a lot of money from it), were able to control whole regions - made the farmers both coerced and complicit - and also to encourage addiction among the infidels, with the exported finished product.
And, secondly, even disregarding regions where the Taliban were strong, and encouraged or compelled or coerced farmers to grow poppies, making them complicit in the production of opium, - if we look at regions which were not under the sway of the Taliban, the challenge lay in persuading farmers to grow other crops instead of poppies, that is, crops that were equally remunerative - growing potatoes, for example, won't cut it, not when you have become used to the easy monies available from the cultivation of the poppy which becomes opium. Afghans asked (reasonably) for suggestions as to what they should - or could - grow which would be as remunerative as growing poppies.
Thus, some of the more enlightened NGOs focussed on saffron; it is very profitable - for it is the most expensive spice on the planet - and Afghanistan (lying between the saffron producing countries of Iran and India) has a perfect climate and conditions for the cultivation of saffron.
The quality of the saffron produced in Afghanistan was very high, and some of the NGOs focussed on both female empowerment, & economic independence - saffron is a high maintenance crop, and requires careful cultivation - teaching women to grow, tend, harvest, produce and market saffron - by encouraging the growth of saffron as an equally profitable replacement for opium.
Needless to say, the Taliban were especially incensed by the thought of saffron production (and female empowerment), where the producers would be at least equally well remunerated by growing saffron, (earning at least as much as they would have from cultivating poppies) would be economically independent, - and would not be growing opium (well, poppies), - the funds for which would find their way to Taliban coffers - and deliberately targeted saffron growth initiatives, especially those that supported female empowerment.