Pretty sure that most of the people who popped their head in here and were somewhat confused (like myself) were genuinely so because it was interpreted that "Electronic Dance Music" is any kind of dance music you can dance to. It was a big surprise personally to find that the term only encompassed a relatively narrow field of what "electronic music" fits into (which is almost infinitely massive), as I'm sure it was to a handful of others.
I think why a lot of people are on the back foot about this is because of seeing posts like "Oh good, finally an EDM thread" when to them, an already appropriate one exists. Then comments such as "This is the general EDM that's less intimidating to new comers, if you want to be a music snob stick to your other thread bullshit" pop up and of course, people get defensive.
Personally, I don't have a problem in the slightest with this type of thread existing (in concept), in light of the knowledge that "EDM" means something very specific (compared to what the acronym literally stands for). It's people assuming that everyone should know what "EDM" is and how it's different to the "Electronic music thread" that gets on my goat. Perhaps to avoid future people from posting things that belong in the other thread in here, change the thread title to "Mainstream EDM". After all, it only started because of how that acronym was interpreted (and understandably so, IMO). Better to have a few people in here going "Well, what other kind of EDM is there?" than newbies posting "Imma let you all finish, but Aphex Twin is the best electronic dance music act of ALL TIME" and getting shouted down for it.
It's the same reason you can't arc up at someone for not knowing that a "thong" in the US has a completely different meaning to a "thong" in Australia. If I created a thread called "Thongs |OT|" and lost my shit because everyone thought I was talking about these: