maurs The idea wouldn't be to replace your default Kagi search with these lenses, but rather to use them when they are convenient. Let's say you're going on a holiday to Greece. You'd use the "Greece Tourism" lens to help you plan, which has been made by people who are experts on the subject. You're not going to use it after you're done with it and it's not going to be there to bother your normal searches. Unless you want it, of course.
Now let's say there's a Kagi user who is an experienced Greece traveller and who doesn't agree with the choices made in that lens. Maybe he/she wants to focus on more frugal travel options, or maybe wheelchair accessible travel in Greece. Then they can fork that lens and make their own variant of the recipe.