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When I have just the camera and attached lens, usually the Canon 5D4 and 100-400mm zoom, then I have it hang from my neck on the original Canon strap.
Why?
Because it is more comfortable for me to have the weight hanging from my neck than it is to have it hanging from either of my shoulders. . Many people say that having the weight hanging from their neck is uncomfortable, but I just don't get that because to me it is more comfortable that way.
But when I have a messenger style bag with the camera body, the 100-400mm, another lens or two, a teleconverter and an extension tube, spare batteries, along with a quart of water, snacks, and other miscellaneous gear, then I prefer to have the messenger bag hang by its strap from one of my shoulders and across my chest so that it hangs on the side opposite of the shoulder it is hanging from. . And then I alternate shoulders ever 20 minutes or thereabouts.
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"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".