How is laser scanning as a part of BIM help Architectural firms?

https://www.bimoutsourcing.com/bim-for-architects.html

Our unmatched skills and experience with architectural and engineering projects will ensure that the greatest value and quality of work is maintained, whether we're working on beautiful external facades or modular prefabricated systems. As contractors adopt precise scan data throughout the project's lifespan, they decrease errors/rework and save money, 3D laser scanning is becoming more and more beneficial to project stakeholders.