How hard is it for them to include a DAC and aux port in their phones? They're tiny! I tried using Bluetooth headphones with the OnePlus 5 but the poor sound quality and constant need to recharge and replace due to their batteries dying every few months was exhausting. That experience was enough to drive me back to the exceptional reliability of plug and play traditional headphones with a Galaxy Xcover 6 Pro.
I don't care how easy it is to replace the batteries in Fairphone's new headphones. Their ethos should compel them to include a jack for those who don't want to waste rare earth metals.