In my opinion, it's relevant to Card's credibility. If he shows poor judgement in one area, why would I want to listen to his opinion on something else, even something which is considered to be in his wheelhouse? Poor judgement is poor judgement.
It sucks that he has those ideas, but he's a good writer.
Try asking better questions if you want better responses.
You're already confidently predicting a negative future for Ender's Game, so you're clearly not adverse to predictions.
The novella was an alright time, though.