I suppose I consider it like this, Google's results might also be better if they didn't show me so much spam. I don't know. My life isn't that much improved due to them. I don't know what I don't know.
I'm okay not having a 10% faster car as well. I'm okay with that. I'm willing to drive a slower car to save the environment. I'm willing to make that personal decision for what I think will be a better internet too.
We can't constantly say, what's best for me, what's best for me without expecting that everyone on the planet doing that will never lead to a planet that's best for all of us. My search results might be 10 or 20 or even 30%, without Google, but the world is better without Google, IMO.
But my experience has been that it really depends on what you're doing. There are a number of projects I've researched where the duck has provided better information.
For now, it's worth trying both. That can be seen as a disadvantage because it's twice the work, or as progress because competition is a good thing.