Way too many people try things they see in porn without doing proper research practice or consents. 50 shades of grey was a terrible time for the bdsm community

Research shows strangulation is never a safe practice, despite a widespread belief it can be performed safely. Though it often leaves no visible injury, oxygen deprivation, even for very short moments, causes changes to the fragile structures of the brain.

Multiple studies have specifically shown brain changes in women who have been repeatedly “choked” during sex, including markers for brain damage and disruptions in brain hemispheres linked to depression and anxiety.

To be honest that actually seems like reason enough even if it is genuinely consensual

If someone dies you're very unlikely that you're getting away with it even if you have firm evidence of consent such as it occurring in a freak accident at a well monitored event. At least that's what the kink educators I've heard from have all said.