Here, the Durood emphasizes exclusivity. There are many paths, but only one Sirat al-Mustaqim (Straight Path). The prayer acknowledges that the Prophet (PBUH) is the singular, divinely appointed interface for guidance. To walk the path, one must follow the Guide.
Durood-e-Ghausia: Blessings and Benefits | PDF | Allah - Scribd durood e ghousia english translation exclusive