Does GRE score predict research potential?

Graduate Record Examination (GRE) score is essential aspect of graduate application for admission into postgraduate and doctoral programs in United States, and Canada. However, a pertinent question arises as to whether the GRE score can predict ability of the applicant to succeed in their doctoral studies?

I recently came across a systematic study [1] which tried to answer this question. The summary of their key findings are below

• Higher GRE scores implied lower PhD completion rates in men. 
• GRE scores also failed to predict PhD completion time 
• GRE scores were unable to identify students who quit in their 1st year. 

Bottom line: GRE scores are not effective in identifying students who will be successful in their PhD!

So this could be a reason why European institutions do not require GRE score as a part of their PhD applications. But then why does North American universities insist on GRE score for PhD admissions? One advantage is that it provides an on par comparison with applicants from different countries and educational backgrounds. But then GRE needs to be revised to make it relevant for the purpose it claims, i.e. predict the academic potential of the applicant

Reference:

1. Petersen, Sandra L., Evelyn S. Erenrich, Dovev L. Levine, Jim Vigoreaux, and Krista Gile. "Multi-institutional study of GRE scores as predictors of STEM PhD degree completion: GRE gets a low mark." PloS one 13, no. 10 (2018): e0206570.

https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0206570