Correct. I see QPUs as any major advancement that comes about. Our knowledge of how to make iron things for instance. On one hand, we were able to reinforce our buildings, boats, and wheels. Which were all great improvements for humanity. On the other hand though... our knowledge of iron brought about stronger weapons. Swords, spears, and even better catapults. All things that often bring on wars and destruction. As soon as an advancement becomes established, it can bring about both great and horrible situations for the world. It always depends on who wields the knowledge and their desires.

That being said, I strongly feel that quantum computing can bring an unthinkable leap forward for humanity. Where we unlock great/major advancements at half the time or greater. But like the example above, this could also set us back if used for warfare, destruction, cyber attacks, and collapsing whole corporations,/industries/governments. The next 20-30 years I believe will either bring the end of the human race or the start of a whole new stage of human existence.