You don't have to be non-preachy to be genuinely funny, though, despite your arbitrary % guideline. Check out Bill Hicks. Nobody has ever accused him of being either too funny or not preachy enough.
As a polymath, your linked post was hardly enlightening.
Additionally, the repeated line "no single company can deal with that entire complexity" is misleading. I can provide examples of companies that deal extensively with most if not all aspects of each individual layer presented.
The truth, though, is that thinking about all the layers together can and likely will make most people dizzy. As for companies? I would propose that a hypothetical company, let's name them "IBM" for convenience, could theoretically deal with each and every layer presented, and I'd estimate they could do so successfully for 50 years or more.