As I said before, it is the site that's the problem, not the tool.
I'm reluctant to link to tools on an official site as it might seem like an endorsement of some kind for WotC's RPG line. Said site is for their RPG game line, the tools are just provided on it.
While it's true we do have links to DnD tools, all of them are third party.
So in this case: it's not so much the tool, as the site providing the tool.