Earlier quoted context omitted.
Keeping Zurich industrialists on their side was essential to helping supply German war efforts-that's how Dehomag laundered its purchases of Hollerith cards from IBM, and I think how GM Europe's part-ownership of Ethyl Inc.facilitated getting TEL to the Luftwaffe. In addition to losing all that, it would be a costly and drawn-out war against an entrenched enemy on hideously unsuitable terrain. The desire was absolute…
They didn't try though, that's the point. You have to try in order to succeed or fail . I mean, the USA famously had a plan to invade Canada - but they never did .
Invading someplace just to discover if it is or isn't invade-able hasn't been a workable strategy since Franciso Pizzaro tried it on Atahualpa.