I hate to be that guy, but the BKT tires shredding over cars is the worst excuse that anyone can use for the lack of cars lately, especially with your example. Tom stuffed the tire into the edge of the front flip ramp, things are going to break. I don't know how many people are hitting front flip ramps these days in Monster Jam, but I don't think it's common. It's also not very common to see a BKT tire shred over cars. I know that there isn't an abundance of cars the past few years, but there is always a few cars at the show and it is very rare that tire damage occurs from going over the cars. Yes, they are sometimes damaged on rougher landings, but very rarely is it because of a car. I've also seen plenty of times where trucks run BKTs at non Monster Jam shows around plenty of cars and the tires hold up just fine.
Now, I'm no BKT spokesperson, but I think that people just hate on the BKTs because they are basically the only tire you see in Monster Jam. Since there is like 100 trucks running BKTs and maybe 5 running something else, yes, it will appear that BKTs are damaged more than other tires, since there are more of them than other tires.
Tires are not the reason that there is a lack of cars. Dirt is cheaper and provides for a better show. Yes, the tracks might not be the greatest right now, but give them some time and they will improve.