Ok then! Why aren't we terrified about obesity, which is the leading cause of death in the United States, killing over 300,000 people a year. (See https://www.wvdhhr.org/bph/oehp/obesity/mortality.htm)
But I wonder how long a single person can remain terrified about anything, or is indeed terrified by e.g. terrorism.
That's:
a) an order of magnitude less than U.S. defense spending b) not funded by taxpayers