Some external tools can be useful without impacting your gameplay.
Tools that helps improving yourself (and yourself only) in an indirect way are good.

What did you do wrong, how can you improve the situation? Those should exist in the game.

Tools that handholds you... Don't try to artificially improve your level, you'll jump make backward progress.
A quick story, thought, I was once in a discord and a player casually posted a video of themselves recording one of their fails. First, their add-ons were displaying so much informations.
Second it was obvious that the zoomhack was installed, they could see the whole map from above.

Today they're still playing and not banned.
SQEX can't ban them, a player would have to say "I'm using a cheating software" first.