Despite what a developer is mostly valued for (delivery), his professionalist on picking the best tools for the job (obviously to his knowledge) should also be

Despite what a developer is mostly valued for (delivery), his professionalist on picking the best tools for the job (obviously to his knowledge) should also be expected, so that his client has the best outcome from his work: Deliverable suitable for the use case, performant, scalable if required, maintainable, etc