Is it necessary for a router to implement routing protocol?

Isn't it essential for a router to utilize a routing protocol in order to efficiently direct data packets across a network? I mean, without a standardized set of rules and procedures for determining the best path to take, wouldn't the router be left to blindly forward packets, potentially leading to delays, lost data, or even network congestion? Or am I misunderstanding the fundamental role of a routing protocol in the context of networking?