I'd be fine with it too so long as it's voluntary and so long as the facility is funded with private money.
So the relative convenience to you and to others personally should be the sole criteria whether something should be tolerated or not tolerated? You would allow consensual gladiator fights to the consensual death for that consensual million dollar prize on consensual pay-per-view? There are enough poor people in the world who would consent to such a risk for such a reward. Clearly, the moral-liberal vision for the world is one of a dark age where only the strong and the rich will survive, while the poor, the artless, the powerless, the infirm, the innocent, and the elderly will not fare very well indeed.