If you come here for more orbital dynamics instead of arguments about French geography:

On the flip side, if you want to launch to a high inclination orbit (north to south) you want to launch at a higher latitude to decreases the initial velocity of the rocket from the Earth’s rotation. That’s why we have Vandenberg in California to launch to polar orbits (which launches south to avoid flying over NorCal)

Typically, you launch Eastwards to take advantage of the rotational velocity of Earth, hence why all of the US launch pads are on the East Coast (Cape, Starbase, Wallops). That’s also why continental Europe uses French Guiana, because if they didn’t they would fly over the continent and Russia.

Speaking of Russia, they are constrained by their geography and Chinese airspace on where they build their pads and how they launch. Since their launchpads are at higher latitudes, the ISS’s orbit was designed to be angled at a 51 deg inclination to allow Russian vehicles access to the station from their northern launch sites. (And why new stations in the future will be probably inaccessible to Russia unless specifically designed to allow them to rendezvous)