Present-day science is driven by placebo-controlled research.
Your "need to be able to say" can have no effective equivalent placebo, and any conclusion you drew from such a case study would be unpublishable and invalid.
This is not to say that I think modern science is correct in this, but it does already recognises the flaws in what you suggest - recording accurate data is not necessarily an existing major problem of science. You can easily record all that data yourself (if you have the resources/cash/time to arrange it), which will probably work out great for you, but it won't prove anything more generally.
Comments
Present-day science is driven by placebo-controlled research.
Your "need to be able to say" can have no effective equivalent placebo, and any conclusion you drew from such a case study would be unpublishable and invalid.
This is not to say that I think modern science is correct in this, but it does already recognises the flaws in what you suggest - recording accurate data is not necessarily an existing major problem of science. You can easily record all that data yourself (if you have the resources/cash/time to arrange it), which will probably work out great for you, but it won't prove anything more generally.