For me personally, seeing the phrase "both sides" used pejoratively is a red flag telling me I don't need to read any further.

When people disagree about something, hearing from both sides is important. Can this ideal of openmindedness be cynically abused by strawmanning one side while steelmanning the other? Yes, but in that case the appropriate response is to criticise the specific ways that one or both sides were misrepresented -- which is also the appropriate response to a piece that only presents one side, and does it badly. Muttering about "both sides" never adds anything to an argument. All it does is signal a deep commitment to remaining entrenched in your current position.