I can see how that could work depends on the setup and the context. For example: People might use `. to jump to the last edit, or to a mark they set manually. Or simply `ciq` to edit inside the next quote without any manual cursor movements. I see people use plugin like harpoon to jump to their favorite location quickly. If you don't know about such setup, seeing people type <leader>1 to jump not just within a file, but across files, seems magical.
Capital letters for marks work across files without plugins.