Why do rec swimmers split the lane?

This is really annoying to me, but why does it seem the first option for most rec swimmers is to split the lane when there are 2 swimmers. I always say we should swim circle if I am in the lane and someone else is coming in, but if I am coming in the person usually wants to split the lane. It is so unnatural to be swimming on the left side of the lane.
Parents
  • I prefer splitting as opposed to circle swimming on the rare event that I swim during open swim. Sure, when a third person tries to join, everyone needs to understand to shift to circle but unless the 2 people in the lane are approximately the same speed, there will be quite a lot of passing.
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  • I prefer splitting as opposed to circle swimming on the rare event that I swim during open swim. Sure, when a third person tries to join, everyone needs to understand to shift to circle but unless the 2 people in the lane are approximately the same speed, there will be quite a lot of passing.
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