KISS is a feature indeed.
I like to think that I can drive my tooling, and I do appreciate not having my choice of build system being affected by this library.
I understand that some libraries are themselves so big and complex that they need a build system. Each library I want to use that doesn’t is a blessing.
Apparently few can. How many image libraries came before `stb_image`? KISS is a feature.
Also, tooling changes between platforms and build systems.