Well I do not run a care tire on my bikes so I am not biased in favour of them .
The pictures actuall indicate one of two things,
That he has draged something that has probable acted like a lever and raised the rear end enough that the tire lost traction,or he was going too fast , over applied the rear brake thus causing the rear tire loose traction . Both of course are rider error
There is simple no way a car tire in those conditions would loose grip as shown by the rubber skid mark unless something else caused it .
One thing we do not know is how high the tire pressure was .The higher the tire press generally the less the contact area .Generall I believe people who run car tires on bikes run much lower pressure than you would on a car .