If you lay out your content as a slideshow, without giving users the option to view it all on a single page, just so you can impose more ads on them, forget being fired from your job. You should be neutered with a claw hammer. You have no place in modern civilization, let alone in the technology industry.
In addition to looking like it came from 1996, a website without margins is hard to read. I would say that the only remaining websites without margins are abandoned personal pages, but Wikipedia and Reddit — praised by hacks as “brutalist” — both do without and they are household names.