Normally I would agree except I have a large head and could never get a good seal with my ear in the center of the driver without it hanging off the bottom of my jaw. That is to say at least 50% of people will not get a perfect seal probably much higher percentage. Also the group delay is very bad and definitely audible. Also why bother getting high-end amplifiers when the headphone is over 5% distortion at 100 dB which is totally reachable on a loud song. There are definitely issues with the High frequencies. It was a headphone for me that required EQ to be totally listenable. My he6se I've never even thought about EQ because the highest don't have that peaky sound although I do think they are great headphones I was kind of shocked considering the HE6 measured world class and it is a decade old.
The HE6 upper mids and treble transition is smooth. The Ananda is great but I think his review was fair. Objectively speaking. it definitely has more distortion in the upper mids relative to the HE6. It's a big driver and keeping distortion down is tough unless you thin the pads, but then you lose the super tall soundstage and open sound. To me, it was a decision that Hifiman took, to preserve it's presentation and I'm happy that they did.