It happens very often that when setting up games you have to make bulk changes, or setup a large amount of objects. The difference between writing code to do it compared to doing it manually is measured in weeks or months of development.
Following industry standards, the addition of editor scripts and a command line to run quick code would significantly speed up development for many developers, and by proxy, help the platform grow.
Additionally, this allows the community to implement important behaviours that would otherwise come after years of updates. The ability to add objects in bulk to an editor array might be 2 years away on your pipeline, but with script editors, I could implement it myself in 10 minutes.
Please consider this.