Indeed. That loading screen misconception has been proven wrong multiple times with commanders travelling in normal speeds from surface of planet A to surface of planet B or station orbiting nearby. No loading screens at all. What we see in that glide portion is a network handshake for the server to decide with whom if anyone, you instance with when you change from gliding to normal speed and viceversa; as you disengage from previous players/NPC and meet new ones and create a new netcode session. But it is not an asset loading screen, assets in Elite are procedurally generated in real time without loading.
The only real "loading", if you can call it that, is when you jump to hyperspace to change systems, since the stellar forge needs the new seed to procedurally generate the new system (plus the new network handshake).