I understand this is targetted towarda devwlopers, bur Can someone explain why should I go through this complex install process instead of just using ChatterUI?

I understand this is targetted towarda devwlopers, bur Can someone explain why should I go through this complex install process instead of just using ChatterUI? It can handle same GGUF format and works great with Gemma and Qwen. What kind of usecases am I missing?