Now tell me that it doesnt invoke greed in you?
Just when you see these shiny bars your mind triggers and starts producing adrenaline and other chemicals that trigger your "greed instinct", and make you want to grab them out of your monitor
You see gold has a charm, and that charm can be dangerous.
Your point is only due to the fact that we know gold has greater value than many of the other common metals.
The scarcity of it also adds to what we know so far about it; of course you would want to get those gold bars!
If I show a kid who has NEVER seen anything except for a wall for 5 years a gold bar, they'll be interested by it! They'll have the same interest as if I show them a shiny silver bar. Or a copper bar. Or even glass.
Gold only has its "charm" because it is generally known that gold is valuable.
(It also looks nice and smooth)