I never said it was not possible to sear meat with olive oil. It is certainly possible, but you have to be more careful not to overheat your oil.
> Light/refined olive oil has a smoke point of up to 470°F.
Where did you get that number? Any source I found gives olive oil a burning point of at most 410F. E.g. https://en.wikipedia.org/wiki/Template:Smoke_point_of_cookin...