Imagine that you have a 99.99 chance of death. There is treatment that appears to work in 50% of people, but it's early days, it's only been tried on 10 people. What do you do? Do you want a bear certain probability of death or a 50% chance of a cure? I think it is entirely proper to allow people with the money to pay for it, to take that gamble. It's their life, not ours. It's their money, not ours. Sure, we need to be sure that the correct data is presented to the client, they mustn't be mis-sold. But otherwise I have no issue with people being free to take a gamble. I would absolutely furious if this chance for life was withheld from me. And so would you be.

Intelligent people understand what a trade-off is. Testing experimental and potential risky treatments on humans does not make it less scientific.

These people will die anyway and most of them prefer to die fighting or at least knowing that someone might benefit(i.e their children) if a treatment is found.

It is both the human and scientific thing to do for them.