It is called confirmation bias. Yes, you can build a tripod like that and it will be very stable, but that does not mean other specifications are not as stable or even more stable.
I would probably use Takahashi as a good sample for stable design:
Mounts & Tripods | Takahashi America
Those tripods are extremely stable, but not that much different from a photographic tripod. But I would not use a telescope mount for general photography, it is too inefficient. BTW, the spread of a telescope tripod is not that different from a photographic tripod in real terms. The center of gravity for a telescope mount is much higher.