Here's my shot-in-the-dark, random attempt to line up the curves more to my intuitions and make them kind of work in relation to each other: https://sketch.io/render/sk-6839906b1c270084fb96acb3fdae4249...
Since there's no quantification defined for either “seniority” or the things measures against it, the shape of the curves is meaningless, anyway.
Here's my shot-in-the-dark, random attempt to line up the curves more to my intuitions and make them kind of work in relation to each other: https://sketch.io/render/sk-6839906b1c270084fb96acb3fdae4249...