AWS Inspector is designed to perform automated security assessments which help in identifying possible vulnerabilities, non-compliance with best practices, and unusual application activities in real-time. This is vital for maintaining infrastructure integrity and aligns with the need for automated solutions in cloud architecture. Other services like AWS Config, AWS Trusted Advisor, and AWS Shield provide different forms of resource configuration tracking, best practice recommendations, and protection against DDoS attacks, respectively, but they do not offer automated security assessment features with continuous monitoring for irregular application activities.