Yes.
No. I just reject the dumb statements you espoused like "People who don't try are guaranteed to fail.” Well actually, you can succeed without trying a particular method, sometimes out of luck, sometimes because you figure out some other method that would work better before you initiated the first method. There can be a significant cost to trying a method, so if we have no good reason to believe the method would work and good reason to believe it would fail (even before we put it into practice), then we would be better off not even attempting it, because that would cost us in the end.
As an exaggerated example to help you understand---
If a committee of people who fights to resolve world illiteracy meets and someone says “I want to solve world illiteracy by poisoning everybody’s drinking water, all in one fell swoop. It will not work in piecemeal and we cannot do sample tests, but it will work if all done concurrently worldwide.” Unless they use information and sound reasoning to justify implementing that idea, we should definitely reject that idea. Your “People who don’t try are guaranteed to fail” makes for a good aphorism but is clearly stupid when you give it slightly more thought.
Similarly you made a comment that “But unless you try, there's no chance in hell to cure cancer.” Try
what specifically? Should we try pumping more methane gas into the atmosphere to cure cancer? Should we try an anti-vaccinating campaign against measles, because it might---just might---cure cancer? Should we try crashing airplanes into the ground because it might resolve world hunger? Should doctors try taking decapitating patients because it might cure their heart disease? At some point, we should not adopt the “let’s just try it, because we won’t know unless we try” strategy of living. We instead use past experience and draw inferences from them, to predict what causes will prompt what effects, and what will or will not work better for us.
You’re still way behind though.