If that's what it's saying then it's just like every other blog post or Tik Tok video from someone clueless person who's never worked in tech.
10 to 1 juniors to "senior" would have any "senior" quitting on day 1. Even 2 juniors will takes up > 50% of a seniors time to corral. 10 of them would be like a mob of people all screaming at you.
Add into that mix an AI chatbot spitting out partially incorrect stuff to all 10 of these juniors that is completely unworkable.