There are a few baseball-related arguments that I do not usually participate in. One is Opening Day lineup talk, because most teams end up using 30 or more players within a few weeks anyways. Another is the nitty gritty details of lineup construction is. Look: most teams aren’t good enough or deep enough that moving batters around in the fifth through ninth spots in the lineup really does a whole lot, which is the majority of the lineup.
But there are aspects to both arguments that I think are really valid, and who hits leadoff and who hits second are two crucial decisions that can make a team better.