I see where you're coming from but in this case I do think there's a distinction - never really got a sense Aurier's attitude was a problem at Spurs; he did play for us a few days after his brother died iirc and was (apparently) quite a popular member of the squad. It was the on pitch brain farts at crucial times that were the problem.Football ability (i.e. actual performance) and attitude go together, you can't separate them - a player's football ability will naturally suffer if a player's attitude sucks. Ben Arfa and Mario Balotelli are 2 prime examples of that. And you may add Ndombele and Aurier to that list. In other words: football ability is very much affected by attitude.
Ndombele is a different kettle of fish imho in that he is massively talented but unfortunately the attitude and commitment are very much in question.