A real relief that no serious injuries have resulted from this incident.
Probably a good thing it was a DVT they are designed to be strong and heavy for use at high speed
On balance, the loco at the other end would be preferable to a comparatively lightweight DVT in situations like this. The outcome/accident severity depends on multiple factors, not least of which being the train's speed, the size of the object fouling the line, the amount of reaction time the driver has - it's almost always mere seconds - to apply full emergency braking, the speed at point of impact and whether or not any debris gets caught under the bogies and is able to cause a derailment.
The location of said potential derailment, the presence of pointwork able to deflect a train with a derailed bogie and cause the train to topple over and whether or not there's a train approaching from the other direction which is able to stop in time should a crash occur ahead of it are also factors to take into account. Further to the first point, while their root causes were completely different, both the Eschede & Granville disasters in Germany & Australia respectively were made so much worse by derailed carriages striking overbridge supports, bringing the deck down on and crushing carriages.
Since a Mk4 DVT was involved in this incident and with all the above factors in mind, it feels pertinent to mention Great Heck and the fate of 82221. After hitting Gary Hart's car, 221 was derailed sufficently to be deflected by pointwork leading into a nearby goods yard right into the path of 66521 hauling a loaded coal train coming the other way. The closing speed between the two trains (142mph if I recall correctly) and the resulting forces/energy of the collision were enough to utterly obliterate the DVT, severely damage the 66 and kill both drivers instantly. The likelihood of the 91 being derailed in the collision with the car had it been leading the train that morning would've been markedly reduced simply because the 91 is twice as heavy as a DVT - 85 tonnes vs. 43 tonnes - but not eliminated completely. That much I can say without veering headlong into speculative territory.