You guys are getting off on a tangent and trying to prove a point by discussing something totally unrelated. You might as well be saying losing Cooper won't hurt because you ate your cranberry sauce on the side at Thanksgiving. The two things just aren't related.
The success or failure of an individual class is based on the aggregate performance of the signees and not one individual. That's as obvious as today being Monday. But how about losing your top target at your biggest need position on the roster? That won't break the class, no, but it can (and will) hurt your program and in the end could be the difference between winning and losing a championship (or something else of significant value).
Want a good concrete example? Did losing Reuben Randle in 2009 break that class? No, obviously not, and nowhere near it in fact. Nevertheless, having him on the opposite side of the field on November 5th was the difference between a win and a loss, and that could be true yet again with a national championship on January 9th.
Bottom line: We need Cooper and losing him will hurt badly.