It’s very compelling if you don’t understand anything about physics. The speed of an object can vary depending on the coefficient of friction. Ie shooting gun underwater vs top of Everest both air and water are both fluid with different density. With elevation air density decreasing and friction decreases, once you reach the edge of the atmosphere there is close to zero friction the same reason you cannot breath up there. Then you have relativity but if you can’t grasp density and friction then you probably won’t grasp relativity.