The software you bought asked you to choose among three deployment models, fourteen entity types, and 170 switches. Then it assigned a consultant to help. Those choices describe a generic product, while your business runs on rules of its own.
Your operations depend on decisions made by specific people, in sequence, under constraints that took years to learn. Configuration approximates that logic and charges you for the gap.
Today, the consultant who configures the product can cost more than the engineer who builds software.