It becomes a black and white thing if you applied that "if criminals can benefit from it, we can't allow it" kind of reasoning consequently.
Then there would be almost no liberties for anyone except those that stand above the laws.
That's the entire point there when making legislation, you can't just consider how something would benefit criminals and then categorically rule it out, you also have to consider what good it might do for society and weigh that against the "bad".
One of the foundations of your Western societies is that it's better to let 10 criminals get away than to punish a single innocent person (Blackstone's Ratio). Thus there are presumptions of innocence until there's proof of guilt beyond reasonable doubt.
At least in principle that is, because even in current times we do have people who are obsessed with punishing all criminals harshly, and will quickly go for a
historically notorious knee-jerk to justify their erosion of liberty, while dismissing criticism as "pedophiles", "terrorists" or the likes.
I see the DMCA as one of those (perhaps milder) symptoms where the presumption of innocence is flipped around into presumption of guilt, where the defendant effectively will have to prove their innocence to get the pre-emptive actions that were taken against them reverted. That way the DMCA has become a repressive tool and it's concerning that Apple is resorting to using it here as well.
And of course the US isn't the only place where this has become an issue.
When I look at what's happening in the EU with their own measures for copyright and "think of the children", proposing widespread censorship and mass surveillance, combined with the rise of the "alt-Right" in various places I see a lot of parallels to what happened around the same time during the previous century.