To submit or not to submit GRE Scores for PhD programs in the United States With the GREs being phased out of so many PhD applications in the sciences, I think this question is reasonably fresh.

I have taken the GRE and scored in the 70 percentiles for verbal and math. I scored a 6/6 on the essay. This score is fine, but not "great" for top biomedical science Ph.D. programs that I am applying to (e.g. Duke, that wants 90+ percentiles). 

Do you think it would be worth it to send my GRE report to show that I have taken the GRE and did attain a "reasonable" score? I have a strong application when looking at other factors (e.g. research experience since freshman year, 2 summer research internships at a hospital and in Amgen Scholar program, strong GPA, 3 letters of rec. from my 3 research PIs). Thus, I feel that my GRE score is the one component that does not equally compare to the rest of my application.

This may be irrational of me, but I am somewhat worried that the programs will wonder why I am not submitting a score given that it's clear I have not experienced major financial problems throughout my undergraduate career (nor do I come from an underrepresented/underprivileged background, which is a large reason to why the GRE has become an "optional" test now).

Thank you for your opinions.
If the institution requires them they must be sent, of course. But, as you say, that is becoming more rare. 

But if they are not required I would only recommend sending them if they were truly superlative, which yours don't seem to be. I doubt that anyone would consider that you were hiding anything if they aren't required. 

Your application need to contain (only) reasons why you are well qualified for the position and highly likely to be a success. Don't include things that point in other directions unless required.