Securing systems security architecture

According to the author of the below mentioned book, there are three key attributes of human attackers, as

follows:

Intelligence
Adaptivity
Creativity
What are your thoughts on this topic as it relates to securing systems?

Textbook: Schoenfield, Brook S. E., Securing Systems: Applied Security Architecture and Threat Models, 2015. CRC Press. ISBN: 9781482233971

Sample Solution