They're both hard to build, but require different skillsets. Moreover, game engines are often customized in unhygienic ways by folks early in their career. Mayb

They're both hard to build, but require different skillsets. Moreover, game engines are often customized in unhygienic ways by folks early in their career. Maybe it's better these inexperienced folks run into the problems with their own unmaintainable code firsthand before they take on world-critical problems.