Why do small to medium businesses have different hiring questions than corporations or competitive startups?
SMBs hire at lower frequencies, have less standard practices, and more often than not have people interviewing who are not trained or prepared to do so. Larger businesses or competitive startups also have on staff or outsource to professional recruiters.
The target audience for this is small to medium businesses, not corporations or competitive startups, who would be potential customers. It's more of a starting place for people who do not think about this much.
My guess is that HN is not the target audience for this blog post, so take what the simplicity of what is said with a huge grain of salt.