What’s the difference between a public library and an opera? Why, exactly, should taxpayers be forced to support a library? Don’t get me wrong, I love libraries and before the web matured I used to spend a lot of time in libraries. But the question has to do with forcing people who don’t use libraries to support them with their hard-earned money. Unfortunately, I see cases where taxpayer money is being used nowadays to support operas. The NEA is an abomination when you consider that Joe, the guy who works in the Chrysler press plant, and will never go to the opera, is having his pocket picked by his government to support the opera.
Hey, we agree on something. Now you know how I feel when government gives "tax incentives" to pro sports franchises or builds them stadiums. Or hands over a "helping hand" to Amazon so that can "create" jobs. Or passes financial sector laws lobbied for by the financial sector so that can more easily fleece the unsophisticated.
In general though, your libertarian ideal never existed anywhere, certainly not in the US, not even before FDR. Mayberry only existed on TV and was slightly less fake than reality TV, except for Floyd the barber, he was real. Your minimalist view of government works fine in textbooks, I'm sure, but so do a lot of other ideas. You're making a common philosophical mistake, you confuse insurance with lack of freedom. It is insurance, more generally the sharing of risk, that has created the wealthy cultures we live in.
Do you really think it's a mistake to have government-backed standards bureaus, to pick one example, or do you think it is really better that we each have to hire an electrical engineer when we buy a toaster to be sure it doesn't burn down our houses? Do you really believe it is inefficient to have public procedures in place to protect consumers from scam-toaster builders or fraudulent mortgage vendors? You do what communists do, you have latched onto one or two simple ideas, convinced yourself of their correctness, and think that everything fits that mold.
You are confusing mythology with how people actually live.