Huh? You just said you are dinging him for making a relationship but then admitting that there is a relationship (albeit partially).
Let's pretend a consultancy is the equivalent of rent-a-center and an individual consultant is a rented out TV. I'm a consumer and I want to rent the TV. I know the TV cost (I searched it on Amazon) and I know I'm just renting it for x amount of days. I know exactly what I'm getting for the price I pay; I get to watch TV for a certain period of time. When building a consulting practice this concept is a bit harder to achieve because the customer has no idea what they will get for $150/hr or $400/hr. They may get a TV that only works for half of the day or for a quarter of the day or half the screen only works sometimes. If it was that easy to assess a person's talent then the customer would just hire single contractors out.
I don't think Jason articulated what he meant by "worth" correctly. You're right in saying there are other values (hence worth) attributed to paying for consultants. However, I think what he is addressing is the fact that potential customers have a very hard time deciding what value your second, or third or fourth consultant is in your newly established consultancy practice. Who are you (as the consulting director) to tell the potential customer that your employee is worth $X/hr? Doesn't the customer ultimately assess the value of what they are buying?
* An hour of talent
* A committed hour of talent a week from now
* A committed hour of talent a year from now
* Any number of commited hours of talent from the same person
* An hour of talent on 1 month's notice
* An hour of talent on 1 day's notice
* An hour of talent from a problem domain specialist
* An hour of talent from someone intimately familiar with your company's business processes
* Hours of talent rotated through a small group of people to keep them fresh, at less than 3x the cost of a single person
* Total scheduling flexibility over talent/hours
* A candidate for internal career development (management, architecture, etc)
* An A-player who poses no political threat to the company's org chart
Some of these are benefits of full-time employees and some of them are benefits of contractors. Some are benefits of staff-aug contracts and some are benefits of project-based consulting and some are benefits of transactional one-shot consulting/advisory gigs. It's naive to suggest that only a raw hour of exercised talent is worth money.
EDIT: I just realized I did actually say "let's pretend a consultancy is a rent-a-center". I should have probably worded that differently - hence the confusion.
I very much agree with your points, especially that "billable hours" is not the point, that expediency or rarity of talent can easily be more important.
A fuller, more accurate treatment of the concept has to include that. Perhaps it's still useful for folks to (sometimes!) think about optimizing the person/hour, since that is of course an important part of the equation, and optimizing it does help.
You are also right (I considered editing my comment to reflect it) that there is a huge market of sweatshop commodity consultants for whom this analysis is completely true. Yes. Avoid this work. The nice thing about being the kind of person who participates in online forums where every other week there's a thread like "Ask HN: What New Technology Should I Learn This Month" is that you tend to be flexible enough not to fall into that trap.