Just how any people do you think actually ride with this load? It's obvious that in the USA there's not a lot.

What is the industry supposed to do? Engineer and develop a tire for you. Call around, if you want to foot the bill a manufacture might exist that will build a tire just for your fancy.

So many times the individual pisses and moans about major industries not meeting their "one of a kind" specific needs, but want it done for a single dime. Perhaps the individual should quit whining and adapt to what is available in the market for their use.

Or, become a billionaire and make that set of tires themselves.

The world goes 'round the way it does. Too bad if you think it's going to coddle your special ass.