We long ago got to the point where audio circuits in phones were perfectly fine for typical headphones. Especially considering the circuitry was mostly built in

We long ago got to the point where audio circuits in phones were perfectly fine for typical headphones. Especially considering the circuitry was mostly built into the SoCs. Good audio circuitry that is completely transparent is easy to design and been known for decades. I had multiple phones with IPx7/8 water resistance and a headphone jack (e.g. LG G6 and Samsung S10) that is a bullshit excuse.