Even though the chemistry of a tire would be interesting, the mechanics (the different elements of the construction-stiffness, # of plies, the way they're wrapped and folded during manufacture etc.) is fairly straightforward and wouldn't warrant much more commentary than the laying carpet or roofing.
People would log on and say the same things over and over.....can't have that, can we?
In another vein, we know "most" people don't keep track of fuel mileage or tire mileage. Sure, there are some thoughtful people here who do track such things and more but the avenues for commentary as we already know, are limited. Those avenues would quickly become familiar streets on a tire forum. "They wore lousy" or "They wore good", is what it'd boil down to.
"Yeah, I had a set of those 20 years ago. The model name was different as was the tread pattern. I don't know how they wore as I sold the car." is what we're reading now.
Plus, all the inevitable negative reviews (internet posting bias) would not attract advertisers.
TIRE REVELATION:
When the family was into Saabs and Volvos, many examples of which are turbocharged, I got into the respective websites.
Among the first things I learned was that there are many folk who have the resources and inclination to pound on their vehicles.
All the "car rompers" who'd grouse about only getting 10K to 20K out of their V,W,X,Y and Z rated softies kinda rubbed me the wrong way.
What did the lead foots with soft, crumbly tires expect?