The GP is plainly wrong. ~Everyone in Switzerland does normal vehicular left turns, and the bicycle exam for schoolchildren includes making vehicular left turns correctly (i.e. signaling, waiting for cars that are in process of overtaking you, moving to the middle of the road, possibly stopping, turning when the way's free of vehicles that have right of way).

E: Source: https://www.stadt-zuerich.ch/pd/de/index/stadtpolizei_zueric...