Did you know that Harvard is the poster child for grade inflation? You didn't mention it at all in your article. It's incredibly relevant to arguments like this.

Given grade inflation at Harvard, getting a degree from Harvard indicates that (1) you got in to Harvard, and (2) you gave it a not completely hopeless effort. This is what "earning it" means these days if it's the mere presence of a degree. Harvard has a 97% graduation rate. Getting in means you'll get a degree unless you decide you don't want one or you mess up spectacularly.

Within the 3.8 average GPA, there is still a bit of room to tell "better" from "worse", if one wants to demonstrate competency at something other than being-picked-by-Harvard. But graduation alone really doesn't do it. Lots of people graduate Harvard without earning it.

If you want to make a compelling argument, you simply have to address this issue.