Don't be sad. This is definitely a skewed perspective from a single person which makes it worse than useless as a way to gauge a random persons competence.

I'm sure you could find a person who would claim this same exact thing for any language if you searched around a bit.

To derive a useful conclusion you would need to control for all of the factors involved in the interviews and objectively measure their performance compared to other people's, anything less than that is completely useless at best.