If you society only imports technology it lacks the experience of reinventing the wheel and the progress of adapting this new idea.

Many inventors were far ahead of their societies, but because nor the public or the elite could understand the invention and it’s glory they got forgotten.

Improving society by invention is also about communication, education and integration. That is why progress takes time - ideas, change and technology needs time to take roots.

So the wheel has to be reinvented again and again, so we understand the process, learn from it and appreciate it.