Changes should only be made to ensure that Classic is stable and viable long term, not because people want it easy, didn’t like the content, want it harder, want different things in different places or a myriad of other “Because I want it” things.
Removing DHK’s is a quality-of-life change. Blizzard is not making a new MMO, they’re making a museum recreation of what the game was like in Vanilla. Vanilla had DHKs. Therefore Classic should and by this post will have DHKs. There is no need to remove them, and no-one has yet provided a fundamental issue with their inclusion except for “But I don’t wanna”.