A conspiracy requires some common reason shared by both parties. I think there's some common-sense split reasons:
1. Left-side, Biden is pretty concerning - there's some serious mental issues showing regularly and undeniably, and while they try to display him as a moderate, his policies are far to the left of even those adopted by Obama. Avoiding coverage of this helps preserve the claim of moderation.
2. Right-side, very few elected officials are being reasonable representatives, and most aim for social media clout over action. Coverage of this would throw a serious wrench in the GOP engine, and lead to greater voter ire. Without Trump to uphold, there's no longer cover for these reps, so avoiding coverage maintains the claim that the representatives are properly representing.
1. Left-side, Biden is pretty concerning - there's some serious mental issues showing regularly and undeniably, and while they try to display him as a moderate, his policies are far to the left of even those adopted by Obama. Avoiding coverage of this helps preserve the claim of moderation.
2. Right-side, very few elected officials are being reasonable representatives, and most aim for social media clout over action. Coverage of this would throw a serious wrench in the GOP engine, and lead to greater voter ire. Without Trump to uphold, there's no longer cover for these reps, so avoiding coverage maintains the claim that the representatives are properly representing.