It is, in that it is not required to play the game. The game operates just fine without ever needing any of those third party sites. Now, yes. They are great tools to have for people who want to make use of them, but they are not required to play the game.
Players have decided to depend on these sites and players are the ones who choose to require the data to play the game as they choose to. Blizzard doesn’t care if someone has a subpar raider.io. Blizzard has set their own requirements to run things, but anything else is data that players choose to lean on.
I do apologize if what I’m saying comes off as harsh or short. Tone is always terrible to try and convey through text and I do try and keep it from sounding like I’m trying to be jerk.
My rambling aside, I do hope that the website gets the swift kick it needs to update your data. It’s just important to differentiate what is required by Blizzard to play the game and what players choose to require.
I do sincerely wish you all the best.