Yes, you are missing the point.
I'll try to help you out, again, by adding context.
I'll provide quotes of the relevant part of the conversation and then explain.
...snip...
NBCnews.com, a mainstream news outlet, in the top 20 according to statista.com, pumped up a white supremacist shooting with 4 articles and ignored 8 other mass shootings that occurred over the same weekend.
Sorry I did misunderstand your point, I read it as if you were saying there were no media reports, not no reports in one outlet.
Where did gunsviolence get their information from regarding those 7 mass shootings? I see they provide sources for their statistics but there are so many in the USA I am unsure which particular 7 you are talking about to have a look at their sources.