Substantially solid research takes years to complete. Each new finding opens possibilties of 10 new research directions that one "should" investigate. The timelines necessary for this follow up research studies blatantly exceed the scope of a Phd or Postdoc researcher and just one scientific paper.

It is not true that no one tries to confirm the results. The labs do further studies internally to follow up. Also those working closely in the field in other monitor these "findings" and try to align them in their own research whether directly comparing them or indirectly using those ideas to support or reject their own observation.

It is never one study but years of past research that lays the foundation for a scientific discovery that finally creates a paradigm shift in our understanding of the field.