Would the most logical path from Normandy to the Bavarian Alps (Germany) pass through Lyon? [closed]

In the movie Edge of Tomorrow, the main characters were travelling by road from Normandy in France to somewhere in the mountains of Germany (a dam)¹. During the journey, one of the characters mentions passing through Lyon, France. Google Maps shows it thus:

1. We decided in comments to narrow it down to "Sylvenstein (dam), about 1 hour south of Munich in the Bavarian Alps"

The highlight (red marker) is on the Bavarian Alps (not the only mountains in Germany to be sure, but some of the most southern). The two stars joined by a red line represent Normandy in the north-west and Lyon in the south-east.

But.. That is heading south east, towards Italy or Switzerland, as opposed to due east, to reach Germany (their supposed destination).

The characters wanted to avoid Paris (it turns out it was heavily defended by 'the enemy' - but would probably have been expected by the characters to be unsafe to pass through even without that specific knowledge).

So, if you're at Normandy, and wish to reach the mountains (anywhere) in Germany but avoiding Paris, would the logical path take you through Lyon (..then presumably Switzerland)?