Would that be something to do with all the bullying and intimidation that went on at the Guardian by any chance?!
Not just that. The Guardian simply wouldn't publish an article like this, even if it's by the most famous and most successful author in the world. At least 95% of the articles they publish on the gender issue are pro gender ideology, and they don't open the comments on them, because they know people disagree with it. In the past, when they did open comments on these pieces, anyone who said anything as mildly reasonable as "humans can't change sex" would have their comment deleted, and if you said it two or three times, you'd get banned.
Thus the good folks at the Guardian no doubt manage to convince themselves that most people agree with them.