But really, I think the author by himself meant all of it to be serious, just that he tried to be humorous along the way.
I think it is pretty obvious no advice from a list can really be used to guide your decision. But it can make you think, "founder is the head of sales" - am I really making a good decision hiring a head of sales so quickly? Yes, the founder is wonderful but a lousy sales person. Similar to the no hiring a CEO idea. Avoid doing so is the advice, if you want to question that impulse but if there are good reasons to, well you have to decide based on the actually situation you face.
I generally find such lists of general advice close to worthless. I actually find this one worthwhile, but sure it has plenty of advice I don't agree with. What I really care about is if it provides some insight and sparks what seems like useful thought.
That type of language is consistent with the humor in the author's other articles.