2TB/5G iPad Pro 12.9 + keyboard + pen = 3000 Swiss Francs (over $3k)
2TB/16GB RAM MacBook Air = 2200 Swiss Francs
For whom are these iPads made? I bought a 12.9 in 2015, and another in 2017, but it's my last. They're just not that useful, and certainly not useful at a level that justifies the price of a very nice laptop!
2TB Storage, 5G, keyboard and pen are all very much optional and not required to use an iPad Pro. If you want a laptop, simply buy a laptop.
Personally I'm much better off with a desktop + iPad Pro combo. When I need keyboard and mouse on the iPad my existing desktop input device can be paired with multiple devices. However that's rare occasion. Most of the time it's simply a much more mobile device than a laptop.