I used to have the same opinion until I started using models like Perplexity / Bing Copilot- after months of using them (the free versions), I now use them daily to assist in my searching, researching, learning, fact checking. Like others said, can just ignore it. I would be more worried if Kagi didn't have it - especially now.
I now have Kagi Ultimate because of access to all the different AI models - makes learning about new things, fact checking, etc... a breeze. 😃 And the reason why I love using it with Kagi is because it's private - my data isn't saved and sold for learning (this is a flag you can do with AI as a business).