There is no such thing as instantly available scientific evidence. Even in physics, hypotheses can take decades to decisively be confirmed or rejected (is string theory true? We don't know. Is holographic universe hypothesis true? Probably no, but we don't know. Is there an event horizon in black holes which light can't ever escape? Hawking recently famously changed his mind and now telling us it might not be).
In biology, there is even less certainty and established theories routinely fail to reproduce. Is Central Dogma of Molecular Biology true? How it couldn't be with such a name? Well, no, there is now a lot of evidence against it.
> A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it.
— Max Planck, Scientific autobiography, 1950, p. 33
In biology, there is even less certainty and established theories routinely fail to reproduce. Is Central Dogma of Molecular Biology true? How it couldn't be with such a name? Well, no, there is now a lot of evidence against it.
And don't even get me started on climate science.