The fact that this policy may contribute to an information cascade is (mostly) a cost to other people rather than a cost to yourself. If your goal is the truth, the presence of this cost is not relevant.
The real question is whether the beliefs of others are a reliable guide to the truth, and if not, what is better. Judging the quality of arguments has IMO not been shown to be something that most people can successfully implement—too much opportunity for bias to creep in.
The fact that this policy may contribute to an information cascade is (mostly) a cost to other people rather than a cost to yourself. If your goal is the truth, the presence of this cost is not relevant.
The real question is whether the beliefs of others are a reliable guide to the truth, and if not, what is better. Judging the quality of arguments has IMO not been shown to be something that most people can successfully implement—too much opportunity for bias to creep in.