That’s not even true. Bose QC35 ii measure objectively very well for headphones. They, like other high quality ANC headphones, use the ANC mic to EQ themselves

That’s not even true. Bose QC35 ii measure objectively very well for headphones. They, like other high quality ANC headphones, use the ANC mic to EQ themselves to a good reference target. Also no one uses closed back headphones for studio work. What does “mid range studio quality” even mean. The vast majority of professionals use speakers in a sound treated room for mixing. Those that use headphones do so very carefully, using EQ to get them to sound right (or getting used to the sound profile of the headphones). The most commonly used are Sennheiser open backs in this area - a pair of HD650 is probably most common. In general it’s fairly challenging to mix with headphones accurately though.