The author also argues that replication efforts are biased because they are mostly made by people who disagree with the original study. That seems like a valid point.
Original, non-replication studies are mostly made by people who agree with what their studies are showing. (Also, publication bias.) So this is not a reason to think replication studies are particularly biased.
Original, non-replication studies are mostly made by people who agree with what their studies are showing. (Also, publication bias.) So this is not a reason to think replication studies are particularly biased.