Simplicity is especially important for developers because it is perhaps the most important determinant for the cost of reviewing, understanding and maintaining code.

But this cost association might be sort of special for systems built with code. Or systems that are built for handling discrete use cases rather than for continuous or approximate use cases.

This is quite speculative and a bit out of depth but: For some systems it might make more sense to duplicate a lot of functionality and use redundancy to achieve stability. Thinking of evolutionary systems for example.