You are pattern-matching it onto the readily-available pattern of "Let's do whatever the hell we want to to animals, because they are lesser beings and don't matter, or at least can't stop us." This may map well onto many of the replies in this thread, but not to my original post.

The problem with banning chimp testing is that it prevents us from making morally correct decisions. If you want to make the universe a place where there is less suffering of sentient beings, then you should want to make it a place where people are allowed to decide what will cause less suffering to sentient beings. This means that either option A (do any and all conceivable experiments on non-humans), and option B (ban testing on chimps), are off the table. These are both immoral (or at least amoral) options, because they both avoid making decisions about whether a particular experiment will cause more or less suffering in the world.