I believe the point is not being a firewall, but rather let the user know what's going on. Firewalls may cause all sort of problems for the common user by block

I believe the point is not being a firewall, but rather let the user know what's going on. Firewalls may cause all sort of problems for the common user by blocking by default, and still don't reveal privacy violations (e.g., whitelisted applications generating traffic at unexpected moments).