“…minimum state intervention…” isn’t part of the definition. That’s a value judgement and a concept that gets thrown around by the idealists. The concept of libertarianism was invented to moderate a necessary and ubiquitous state, and can’t exist without one.

You defined classical libertarianism or right libertarianism, which grew up to be what we see as The Libertarian Party in the USA today, for example. It was “rebranded” specifically to add the notion of “minimal state intervention” - to make themselves distinct from libertarians (who functionally existed, at that time). Much like classical liberals, classical libertarians are antithetical to the definition of their namesake.