It's true, the glues and binders within the synthetic products do not meet vegan standards, which is why Tesla isn't advertising them as vegan.
However, as has been noted, the performance of the synthetics especially in terms of wear and stain resistance, exceeds leather by a large amount. If the other factors like the feel of the material and the comfort level are at least equivalent, and the cost is equal or less, then we have a superior product.
The mindset has always been that you had 3 choices: leather, vinyl, or cloth. Cloth had terrible wear and stain resistance, although it was inexpensive. Vinyls of many years ago were plastic-y, did not feel good to sit on especially in summer heat, and didn't have much more wear resistance than leather. Hence, leather became universally known as the premium product.
But this is really not the case anymore. The vinyl products appear to have surpassed leather in most categories. The only thing that's still a drawback is that "it's not leather".
In the 70s and early 80s, the best cassette tape desk you could buy was a Nakamichi. Everything else was inferior. Does anyone seek out a Nakamichi anymore? No, because digital audio surpassed analog tape performance and made the Nakamichi irrelevant.