If someone is giving life-coach type advice, an ad hominem actually might be relevant, right? The blog post doesn’t really make any arguments, it is just advice based on his observations. Which is fine, but it hinges on his expertise.
An ad hominem isn't always a fallacy. If you put yourself out as someone with credibility or expertise in a field and use that to back up your ideas, you have put your credibility on the table to attack.