[Klathmon]

>It dilutes the concept, making it less relevant and useful. Currently I know that I can sell something I make using open source libraries; tomorrow, I won't.

I'm not trying to twist your words, but that point has already been crossed in my opinion. You can sell some code, but it comes with a lot of extra work that you'll have to do in many cases (if it's copyleft), and all licenses have additional restrictions or aspects that must be followed.

Just because you can categorize many of those licenses into some umbrellas doesn't mean you can wholesale ignore the details of each since it's under some category of "open source".

"Open Source" already means many different things. Copyleft, permissive, are patents or trademarks included? Can you give a warranty? What form of distribution counts? How do you need to make the source available? All of these things vary wildly among OSI licenses, and in the end it's not causing any massive issues because the overarching term isn't used as a technical term, it's used as a colloquialism.