The expectation in the industry is that Senior people would be even better at it, because of their years of experience.
This,however, is not what I’ve seen on the ground. Most senior devs that I interviewed, who were clearly smart and experienced took much longer than new grads to solve most of the questions. Personally, I try not to hold it against them, if they can clear the bar, but I wonder how many other people do the same.
Also, I know in music they do blind interviews, were people perform behind a curtain to avoid any biases they might have (gender, race etc).
May be it’s time to do something similar in Software, since we already are prioritizing white board interviews above anything else?
Edit: I am not advocating for Leetcode types of questions. I do believe that most companies hire like this (including my current company, where I get minor if any say in hiring process). So just pointing out my observations regarding the status quo.