That pic is likely of a guy who trains. The anatomy chart is just a drawing or a general image, and isn't real life.
I'm confused though. It sounds like you're talking about the "teardrop" on the legs, which is usually a part of having a well-built leg. But I don't follow. Do you have that already developed or do you want to build it?
If it's already built, good on 'ya. Keep doing what you're doing. You almost-certainly won't "outgrow" it if you keep building your legs. If you want to build it, a few articles have tips for hitting it. Thibaudeau talks about it here.