It strongly suggests that there is no designer or guide. That whatever happens is an interaction between biology and environment, where microbes ruled for three billion years *three billion years* before multicellular organisms evolved, which may be due to oxygen levels rising, etc.
''New research suggests that the Cambrian explosion, a rapid burst of evolution 540 million years ago, could have been triggered by only a small increase in oxygen levels in Earth's atmosphere and shallow ocean waters12'' - Small change in Earth's oxygen levels may have sparked huge evolutionary leap (phys.org)
