Because traditionally good software engineers in an interview would treat each other as colleagues, not turn the meeting into a one-way hazing. The CS101 hazin

Because traditionally good software engineers in an interview would treat each other as colleagues, not turn the meeting into a one-way hazing. The CS101 hazing interview style was popularized by some CS students with no work experience, and then cargo-culted as religious rituals by others who also didn't have any other conception of what interviews for experienced professionals should be.