The problem of fake news is not actually that you (a rhetoric "you"), with a presumably above average intelligence, is able select or be skeptical about your sources of truth, but:

1) The researched human behavior where "1000 lies must be equal to 1 truth".

https://www.researchgate.net/publication/256486791_Credibili...

2) Monopolizing the information stream: the attention grabbing effectiveness of deepfake videos to convey fake messages and its novelty incentive to share them on social media, added to the fear-of-missing-out they generate on viewers and the fact that "the effort required to refute b* is 10 times greater than the effort required to produce it":

https://www.telegraphindia.com/india/social-media-fatigue-an...

3) voter apathy caused by news fatigue due to the sheer volume of fake news, to which deepfake adds a new vector:

https://www.nytimes.com/2019/11/18/us/polls-media-fake-news....,

https://www.datadriveninvestor.com/2019/07/04/chronicle-fati...

4) A majority of youngsters can't really spot (or care) about fake anymore:

https://qz.com/1750839/most-young-2020-us-election-voters-ca...