Guessing you didn't play through the College questline.
On a random note, I think "sell-sword" is a stupid word, and whoever decided to make it such a prominent term in Skyrim should be excommunicated and stoned with ferrets.
In respect to the other artifacts most their power was in the idea that they could manipulate Lorkan's Heart, much like the Eye of Magnus is a ball of pure magic but is controllable with the Staff of Magnus, once the eye was removed and contained,the staff just became a powerful staff, not a game changer in the outcome of the world. I am not saying its not powerful, just that its epic power is limited to the effects of other artifacts. Compared to the Oghma Infinim which can cause massive power shifts all by itself or the Skeleton Key thats used by someone who knows how.
The term Sell Sword is no different then Mercenary, Gun for Hire, Ronin Samurai.. Just another term describing someone who sells the use of their skill with a sword for money.
Is it enough to allow somebody to easily achieve CHIM?
I'm sure it would be a big step in the right direction to understanding how it works, but actually getting there, I don't know, it is more of a manual of information that mortal beings shouldn't really see, like getting a copy of the base code of a game you are trying to hack.