It does not avoid it. If you navigate to NW to Impasse de Froideville, it will navigate through it. It just calculates les impact for bicycle routing through side tracks (has probably bigger penalty for main roads).
I've added some inclines and roughness to the side tracks. Osmand now navigates slightly better. For graphopper we need to wait a week till routing DB update.
Anyway the side road is more fun on bike. And if you ride a road bike, it if always better to use car navigation.