I do...
For example, even if we are remarkably effective and 85% of all our test group is still alive, there is still 15% more better we can do.
It would be great to eliminate surgery, radiation, and especially mustard gas aka "chemo-therapy". ( if you look up the drugs for chemo-therapy seems all or most are derived from mustard gas )
There is a probability that if we "change the standard of care" it may only be by way of adding our method and substance to everything else.
It would be great to eliminate one or more of the existing treatment methods.