headphones are a compromise in audio reproduction compared to speakers. A pair of 300 dollar speakers will make you wonder why a 5000 dollar headphone exists, at least above 100 hz. I listened to the Audeze LCD-5, and only headphones in that tier imo are able to do speaker level detail/dynamics, ofc without the soundstage/imaging capabilities. If I have the perfect sub/low end response, I'd take my Adam T5V over those LCD-5s or other top tier headphones ANY day of the week.
But the thing is, with every market, there's low end and then high end, yk, the need for "more", so even though 100 dollar headphones are decent and do their job well of allowing you to monitor stuff at a personal level, there's levels of quality. Now if one is able to produce a product that is top of the line in their market, would they not charge high? That's exactly what happened. All these headphone companies got their best tech out and started charging astronomical prices, why? Because price is part of the appeal.