A 60 durometer Maxxis Minion as example has a higher thread count gives more sidewall support and a stronger sidewall which allows me to run less air. It works. My front end never washes out, and while my friends cuss, lose traction, and have to put their foot down, I get incredible climbing stick on my back tire. Look, if you don't want to try it, don't. I really don't care.
"It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt."
-- Mark Twain