Jazz is not Blues and Blues is not Jazz.......

I don't suppose everyone is old enough to remember "radio"; meaning what we listened to for entertainment because few people had TV.

I was a child myself, so that was a long time ago. Blues was "Delta Blues" and jazz was Charlie Parker, Dizzy, Sonny Stitt, and the most prominent jazz musicians. They came on "one" radio station only, along with Gospel on Sunday. That's how they came to be lumped together.

That was the answer to the question almost 70 years ago. Does an answer to a question that's 70 years old count?

**** They came on "one" radio station only, along with Gospel on Sunday. That’s how they came to be lumped together. ****

That may very well be how they came to be lumped together, but there is a reason for WHY they were lumped together. Because Jazz, Blues and Gospel all come from the same place (metaphorically speaking); they have much in common so are likely to appeal to the same listener base. After all, why not Classical on Sunday instead?Polka on Monday and Tuesday is just as bad 😉.

Two left ears:

I don’t really know whether your comment about jazz and blues is meant to be sardonic. 
Please see

http://www.gregtivis.com/articles/Jazz-and-Blues.php

for starters. 

@edcyn, I know what you mean with your "fussy, smug" characterization of some Jazz guitar playing. There is one guitarist who doesn’t play Jazz that way, and he’s also great at Blues, Hillbilly, Rockabilly, 50’s Rock ’n’ Roll, and just about any other music that can be played on six strings: Danny Gatton. He is a true musician’s musician (Vince Gill, himself a mighty fine player, nicknamed him "The Humbler"). He’s no longer with us, but most of his many albums are pretty easy to find. There is also a 2-CD retrospective collection on Rhino Records.