Are the gaming chairs expensive simply because they’re “gaming” chairs? Plus other questions from a noob

Hi everyone, I’m primarily looking for a really nice chair so I can be comfortable while gaming. But I’m also planning on doing work like video editing/writing at my set up. Are the gaming chairs like the Embody or Aeron worth it? Or should I just go for a normal Herman Miller chair? I’m familiar with other “gaming” chairs, and usually those are pretty terrible.

Side question: Are the black friday sales usually pretty good? Some of the gaming chairs are currently 25% off, wondering if we could potentially see 40% off or something during Black Friday.

Thank you!