If you arent going to run low enough pressure for significant sidewall flexx, then 10 lbs, 15 lbs, or 40 lbs, it makes no difference.
Most folks that are keen on keeping their pressures up because they are of the mind that less doesnt do anything, simply have not been in a postiion where low pressure made the difference for them.
Regardless of what pressure you run in any iroc, they are prone to sidewall tears. Just one drawback to a lighter weight flexy tire like an iroc. BFG krawlers suffer from the same problem.
I run consistantly at 4 psi for 90% of my wheeling. Max I will run is 8-10 if I am doing high speed race type driving.
If your wheeling application doesnt warrant low pressure, thats fair. Denying the actual performance difference on the other hand is just naive.
my 2 cents