I just searched "how to fix a flat tire" on both Google and Kagi and got pretty similar results. Different in display but no .edu links in sight.
A listing of top global educational institutions would only have a few thousand entries.
It's not without some irony that I note that the early, and much belated, Internet was largely edu domains, along with a handful of tech firms, government agencies, and military entities.
https://www.goodyear.com/en-US/learn/tire-care-maintenance/h...
On Kagi you have to go until the 10th result to get something from Bridgestone, which explains the same thing while being less aggressive about selling tires:
https://www.bridgestonetire.com/learn/maintenance/how-to-cha...
So the trade-off seems to happen between seeing fewer ads and having better tolerance for imprecise queries.