How is the assumption that Afghanistan is very similar to the Swiss Geography taken as so accurate, here? It is anything but that.
Switzerland is an alpine region with fertile and green meadows and forests in it's valleys and plains, bordering countries with largely sedentary and civilizational populations. Historically, there have been no transforming incursions into Switzerland in a more violent or drastic manner, because of that. Germanic settlement and transformation was largely a migration.
Let's move to Afghanistan, now. You are in a land that's largely a desert, with very few river plains to the North, along with oases, with certain riverwashed valleys in the South and the East, in the midst of the deserts. The rivers aren't Danube or Rhine, but these are smaller rivers, like Helmand and the Ancient Saraswathi/Harahwati. Steppe incursions transformed the region drastically each time, leading to ethnic tensions that still run. The lack of the resources is a major factor, even if you ignore that. The region has been a warlike land and peoples, unlike Switzerland. Let's ignore and get to what we will need, to transform that.
Given the above reality, getting a Switzerland in Afghanistan needs a lot of Social Capital along with Industrial/Material and Resource Capital. It's not easy to manage all these. It needs a huge investment and infrastructure, to transform everything, bit by bit, and could take multiple decades to more than a Century.
Some drastic changes could be implementation of Underground Nuclear power plants, driven by a powerful intellectual and industrialist/trading elite (maybe more prominent, surviving and numerous Sikh Khatris, Hazara, Sogdian, Bactrian and Persian merchant/trader communities or even surviving Greek or Kushan trader communities in Afghanistan?), and then terraforming and greening the lands using those, setting up cities and more industries, setting up an R&D ecosystem, all the while supplementing these with Tourism (if you want a Switzerland, then Tourism along cannot sustain everything like it does in the Maldives). Pretty much that, because, as my pet peeve, for transformations of this scale, only widespread Nuclear Energy use is the solution.