You agree that "Chris" isn't really the kind of person who can/should become an AA. You don't want to demean him by slinging insults his way and calling him names. That's understandable -- you're probably a "nice guy," so you don't want to cut him down because he can't mitigate the issues that led to him scoring so low on the GRE beyond a certain extent. (I.e., he can only improve his aptitude to a certain extent).
And yet, even though you personally don't feel that Chris has any business becoming an AA, did you actually take it upon yourself to help this gentleman by kindly pointing out that fact? No, you didn't; it took me getting you riled-up before you even chimed in.
My posts may come across as abrasive, but I'm doing these people a bigger favor by brashly pointing out the basic realities of what they're capable of achieving than you are by staying completely silent. It's people like you who are helping to engender these folks with a sense of totally false hope when their time and energy could have been wisely spent pursuing a career that they can realistically hope to attain.