Yeah if you created a hugely popular and successful framework, or are a technical fellow at Google, you don’t even need an interview. But for slightly lower bars of “best” I think you would be surprised just at how bad many people even with decent credentials can be.

I just can’t envision a scenario where a company is one I’m interested in working in (good pay, good work, good culture) and where I’m not willing to try to work there due to a one day interview, no matter how good I am. I’m by no means “the best” but I would only go through the process of changing employers/possibly even moving if tens/hundreds of thousands of dollars were at stake, and a day is not much time to spend for that.