However, it's bad advice for ALL drivers, regardless of skill.
The primary purpose of the tires is to maintain traction. In order to maintain control, it is more important for the front tires to maintain traction because they steer.
The intent is to PREVENT the loss of traction in the first place. Any talk of what to do once traction is broken is secondary and a distraction.
First off, this exchange is veering off topic. With regard to my thoughts on the OP and concerns with a new tire being paired with the other tires that have over 13k on them, refer to post #37. In the scenarios that yrwei52, shadonoz and I are discussing, such a minor difference in wear would not apply.
I would argue that your advice is bad for all drivers.
When it comes to steering, you're right, the front tires are the most important because they are the limiting factor. But if the front tires have more grip than the rear tires, you are much more likely to experience oversteer. This is because you're driving the car/taking corners based on the cornering ability/traction available from the front tires,
without taking the reduced traction from the worn rear tires into account.
With the worn tires up front, you don't even worry about the rears, and because you'll be limited to the traction/cornering ability of the front tires, the only time you'd lose traction would be due to understeering. Thus you are much less likely to lose control of the car, as you are more mindful of the limiting factor (front tires). This fits in perfectly with the intent to prevent the loss of traction in the first place.
To illustrate further:
Example 1: New tires on the front.
You've just entered the on-ramp. As you accelerate through the turn to merge, the back tires kick out. You lay off the throttle and countersteer to correct until your rear tires regain traction.
Example 2: New tires on the rear.
You've just entered the on-ramp. As you accelerate through the turn to merge, the front tires start to lose grip and you notice a bit of understeer. You lay off the throttle and the car corrects itself as the front tires regain traction. No countersteering required.
The point of this is to show just how much easier it is to regain traction in the second example. If you lose traction to oversteer, it happens very quickly and you don't have a lot of time to react. If you lose traction to understeer, the loss in traction is gradual and you have much more of an opportunity to correct it by simply easing off the throttle.
As I mentioned earlier, oversteer is harder to correct than understeer. Thus if you have to experience one or the other, understeer is more desirable for two reasons: it is easier to correct, and when it happens it's usually quite minor unless you continue to accelerate.
You may personally feel that you can manage oversteer much better than most, but since we are talking about advice for all drivers regardless of skill, I would urge you to remain as objective as possible for the sake of argument.