Probably because the comments would make them look bad. That seems the general reason for a Guardian article having/not having comments. If they think the use

Probably because the comments would make them look bad. That seems the general reason for a Guardian article having/not having comments. If they think the userbase are likely to agree with the writer they'll be on, and if they think the userbase is likely to eviscorate them (or in cases like this, talk about adblockers and stuff), then they'll turn them off.