None of the threats they mention involve encryption much, not in the sense of the FBI having access to the content. Ransomeware and phishing attacks, which are the high-cost items now, don't need that.
Anti-terrorism might, but US terrorism today is a family affair. Since 2010, almost all US terrorism attacks have been by individuals.
The Las Vegas shooting, Boston marathon bombing and the San Bernardino massacre were by family members. The Garland, TX shooting was three guys from Phoenix who lived together. In no case was any encrypted communication involved.
Anti-terrorism might, but US terrorism today is a family affair. Since 2010, almost all US terrorism attacks have been by individuals. The Las Vegas shooting, Boston marathon bombing and the San Bernardino massacre were by family members. The Garland, TX shooting was three guys from Phoenix who lived together. In no case was any encrypted communication involved.