Most people (nearly 90%) are right-handed, so most of the notes and chord diagrams in guitars, guitar accessories, and manuals are for right-handed players. Like all other things left-handed people do in a right-handed world, quasi-left-handed guitarists will also adjust.
These guitarists use heavy-string guitars and left handed guitar. Like right-handers, these guitarists have their own style. If you don’t know their stories, all you have to do is Google them.