It's a logarithmic scale.
You get the same situation in many things - buying a car, or a camera, or a guitar or violin.
You can get crap for cheap. Double your money & you can quickly get to 'pretty good'. From there it's a logarithmic scale, every time you double your money you get maybe 10% better. By the time you get to truly outstanding you're spending ten times as much. Increasing quality in most precision structures gets more & more difficult, & therefore expensive, as you reach towards 'perfection'.
The same still actually applies to a CPU chip. They make millions & test them all. The ones that come out higher quality get stamped with a higher product number & cost 5 times as much as the ones that didn't pass muster & are farmed out to the masses cheaply.
You are also in more rarified air with any high end product. Fewer of the really good ones are made & sold than the general run of the mill. Mass-production brings costs per unit down. Hand-made or even hand-finished is expensive & labour-intensive.
Consider the Neumann U87. Industry standard. Pretty much perfected in the 60s, though there have been some slight tweaks over the years. As far as I'm aware, machine-made, hand-finished & measured.
They hold their value. Whether you buy new or 40 years old, you'll still be paying around the same price - two grand or so - unless they have some 'collectible' value.
Be glad you don't work in the film/TV industry. You can get a cheapo lens for $£€ 50, but a serious cinematic lens is going to be getting towards the price of a good car; or for a set of primes, the price of a good house. See Just How Expensive Are Real Cinema Lenses?
If manufacturers could make Rolls Royces, or Neumann U87s, or Stradivarius violins for cheap, they would. That way costs right through the production would be smaller - & everyone in the world would buy one.