As someone who lived in both places I can easily tell you that Geneva traffic jams / crowds don't come close to what most employees of SF tech startups endure on their way to work.

To make Geneva as awesome as Silicon Valley, you'd have to prolong the jams and time spend on the road by about 2-3x and remove all the busses and trams.

The rent in those region from what I've heard from colleagues (I work as a SWE in Paris) is trough the roof. you also have to pay taxes in both countries, but compensation wise you'll still end up with a significantly better deal even taking into account things like cost of living. The commute is not better for me or my colleagues in the Paris region.