I think you are confusing inability to communicate with inability to think. Many animals are dumb, Many are smarter than we give them credit for. In past few d

I think you are confusing inability to communicate with inability to think. Many animals are dumb, Many are smarter than we give them credit for. In past few decades there have been a great many papers indicating some animals can do things just short of what we can do and many people used to think that animals could think, feels emotions, learn by trial/error or even communicate. You are making an assertion "No animal thinks 'Why?'" without evidence. You could be right or wrong, but you have chosen an odd place to stand. You are inside an ever receding pocket of ignorance.