I've seen this distinction made in many "communities" including Ruby, Python and Perl.
Perhaps in your domain/language this distinction isn't important but it is for some of us. The patterns you use to work with concurrent vs parallel code differ, which means it is an important distinction to understand.
My claim isn't that this distinction isn't useful, it's that the terminology is a disaster, and we should find better terminology to make this distinction. There's no consistency in using these particular terms to refer to these particular meanings.
Perhaps in your domain/language this distinction isn't important but it is for some of us. The patterns you use to work with concurrent vs parallel code differ, which means it is an important distinction to understand.