Default Should diesel 4x4s be big tire or small tire?

I wanted to get the masses opinion on this... We have some local guys crying lately, that the diesel 4x4 trucks should have to race in big tire since they are 4x4. This all started when a 7000lb 4x4 took 2nd place in an event at the track here in San Antonio, it really hurt some feelings...

My argument is, these trucks weigh over twice as much as these small tire cars, if you cant outrun a heavy ass diesel, you need to seriously re-evaluate your own "race car". Now we are seeing events that will not allow 4x4 as well...

I thinks its bs to outlaw 4x4 or make them run against much lighter, much more powerful, race cars with a true daily driver street truck.