If it were optional it wouldn’t be downloaded by default.
And people who want it can add it. It would be great to have an experience more like SE was before 2.0. Finite planet sizes, but still with all of the space travel stuff. Similarly, ores should not be made infinite, if players want infinite ores they can add Infinite Resources or Deep Core Mining (more like SE).
You turn off so many people by adding stuff outside of the core intent of the mod: finite sized planets.