docs(plugin-activity-guard): generalize entry problem

Author: ENvironmentSet

extensions/plugin-activity-guard/README.md

@@ -1,9 +1,9 @@
 # @stackflow/plugin-activity-guard
 
-Applications often need to redirect users away from an Activity until entry
-conditions such as sign-in, onboarding, or terms acceptance are satisfied.
-Implementing those checks at individual navigation call sites or inside
-Activity components duplicates the policy and can apply it inconsistently.
+Applications often need to control users' entry into an Activity based on
+conditions such as sign-in, onboarding, or terms acceptance. Implementing
+those entry policies at individual navigation call sites or inside Activity
+components duplicates the policy and can apply it inconsistently.
 
 `@stackflow/plugin-activity-guard` centralizes these entry policies as typed,
 synchronous Guards. Before an Activity is pushed, replaced, or selected as the