Incidentally, there has yet to be a public transaction in Bitcoin's history in which people have purchased anything in the real world.
Inaccurate. People use Bitcoin to buy and sell goods and services every day. It just isn't publicized like the Bitcoin pizza transaction because that event was the first time that Bitcoin was traded for something in the real world.
In fact, even
Investopedia recognizes use-cases of Bitcoin for goods and services, listing car dealerships, and stores such as jewelers, tech providers, e-commerce and more.