I think you are kind of missing the point. Regardless of the reasons, people do not want to install an extension from an unknown provider to test out a search engine (at least on HN), you’ll even get a very hostile response.

If you aim to make your search engine a success, regardless of your reasons for that. You’ll have to deal with that problem. Trying to convince people with some idealistic talk does not seem to be working from what I can see in this thread (and anyway, is not scalable).

Alternatively, you can try launching somewhere else, but I imagine the reception on Reddit will be just as hostile.