Why do audiophiles avoid tone controls?

Remember bass & treble controls? So easy to use, or bypass if they troubled with your purist tendencies. Equalizers? Never embraced by the audiophile crowd, except for the Cello Palette and the Schiit Loki. The Cellos are vintage, but Loki equalizer is just $149, and it sounds great, https://www.schiit.com/products/loki #highendaudio