I've seen a lot of pictures of the thru-axle DMR TB alllllll effed up. like, bent, folded, and wrecked.
I've developed my own, totally out the @$$crack theory, straight out the butt: I suspect the TZ results in the thing being too stiff/rigid to live thru any kind of serious nonsense. Like, with a suspension fork, the sliders can bounce onto the stanchions, and energy can be absorbed. With a bolt-on standard axle orQR, there's enough "give" to absorb mess. But, with the super stiff, totally rigid DMR TB w/ TA, all that energy can't "go" anywhere. Hence, the scary photos on the internet, eg:
That's just the first hit. Admittedly, some folks sort of vouch for the fork on there.