Apparently you can (for at least part of the disease) reach the earlier stages of sleep, while the latter stages are the vital ones for staying alive and "rejuvenating" the body etc.
Also, while saying "I would opt out by suicide" it doesn't really diminish the horrendous nature of the disease simply because you chose not to experience the latter part of it. You could also commit suicide 20 mins after being diagnosed with ebola; it's still a shitty disease tho.