Well, one reason is that we have set up an academic system of scientific research that shuts that kind of progress down. Systematically. If it still happens, it happens despite the system we have set up, not because of it.
The attitude exhibited by
@eLife here is a clear example of how this works. An editorial board full of minds with thoroughly conventional ideas about biology does not have time or incentive to engage with unconventional ideas. The same happens when you get grants reviewed.