Ways of integrating with AEM
Manually Configuring the Integration with Adobe Target | Adobe Experience Manager
Integration with Adobe Target using IMS | Adobe Experience Manager
The 2 methods above seems to be the commonly suggested ways of integrating AEM with target. How are these methods different from just directly adding at.js as a script reference in your AEM page component/markup? (like over here: Can I Implement Target without a Tag Manager? | Adobe Target).
What do the lengthy integration methods in the first 2 approaches provide over just downloading and adding at.js script reference to your page header?