These rumors/stories, whatever you want to call them, is all new to me, but its just a way to dehumanize a certain group and therefore helping to justify labelling them the new boogieman.
ELI5 Its a way to make a group of people appear less human and different from yourself. This makes it easier to not relate to them and use them as a bad/ evil example of something you want to avoid.
You can probably do some more advance tasks via CLI. Also usually lists information faster. But honestly you will be overall fine with GUI a majority of the time.
Some people just like being in the terminal.