>Where do they draw the line?

I'd say they just did. They're sticking with what they have now, and not using the newer, better technology.

In most sports, there is an intersection of skill and technology. In order to keep things interesting, you typically want to increase the amount of skill required, and lower the amount of technology. However, there are times when that may sway one direction or the other- safety is an obvious exception to the above.

There is no reason to insert fallacies; this is normal and has been going on as long as sports have existed. The only interesting thing here is that the top teams are taking a stand before the ruling body makes a declaration. That will still need to happen, but this will likely sway the decision made.