When you take the testshot of the testchart, you essentially have a image with a lot of different color patches - and the RGB values of each patch is more or less exactly known. Profiling thus makes it possible to improve the translation that Lr makes based on the information the camera generated file recorded. then you shoot a image of the supplied testchart, show it on your monitor, adjust the white balance based on the supplied patch in the testchart and then the appropriate software makes a camera/lens specific profile and stores it in a place where Lr or Ps can find it after shutting down and started up again. to start with you need a already calibrated monitor. The Xrite profile making software does a different thing. you then can use the monitor to visually fine tune the image to your liking. To calibrate a monitor means you want the monitor to render color, luminosity and contrast as closely as possible as what will appear when you print.
I think you are comparing two quite different items.
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