Well I don't use the Kagi Orion browser at all, I use IceCat on all my PC stuff, and Firefox on mobile.
I do generally agree with your broader point, however in 2024 I don't think it's realistic to stop utilizing search engines while not inadvertently giving up PII. I mean, I could, but I do think my life would be considerably worse.
At least with Kagi, they have some means of making money that doesn't involve selling data. It's entirely possible that they betray us and start selling our data anyway, I'm not completely naive, but at least it's not an inevitability like with ostensibly free services.
Please don’t. Just look at the paid services/products around you. Don’t give more PII to a browser vendor than is necessary.