* Crypto has made minimal contributions to actual user security for the last 10 years. It's hard to claim crypto "got us through the 2000's" when, for much of that time span, every platform in common use was vulnerable to flaws that ultimately yielded your OS kernel to an attacker.
* Meanwhile, most --- literally most --- efforts at deploying crypto have reduced security, by creating new attack surfaces riddled with easily-exploitable flaws.
I don't think this is a very tricky argument, although the place it leads you to may feel counterintuitive and wrong.
