The reason why Gordon Ramsay uses so much olive oil is because Gordon Ramsay values olive oils versatility as well as it's beneficial healthy fats and flavor enhancing qualities that add richness and depth to dishes.
Gordon Ramsay also emphasizes the myth busting aspect, and highlights that extra virgin olive oil can withstand high heat, which makes the olive oil suitable for frying and other cooking applications and not just for use as a finishing drizzle to dishes.
Olive oil is also a very popular oil in Western Europe, because Western Europe also grows a lot of olives for oil production so that is another reason why Gordon Ramsay uses so much olive oil.
Olive oil also adds a rich and fruity flavor to many foods or dishes and enhances the overall taste.
The olive oil is also particularly prominent in Mediterranean cuisine, and Gordon Ramsay also often draws upon Mediterranean cuisine.
Gordon Ramsay also uses olive oil to keep spaghetti and noodles from sticking during cooking, but the olive oil when added to noodle and spaghetti water can actually prevent the sauce from sticking to the spaghetti or other noodles.