I've used GitHub intensively for 13 years. I've never looked at the front page or "feed". Why would you? GitHub is for working with git repositories, it's not a social website.
I am interested in Japanese learning and Emoji and I am actually happy that Github recommends me repos related to these topics.
That's great, if you never look at the front page nor the feed, you're not even affected by this change. Leave the "outrage" for people who are affected by it.
If a sufficient number of gh users do look at the page, you’ll be affected by SEO on the repos you follow if they care about growth.
No one is worried about a page you can ignore. We’re worried about the second-order effects that trying to game that page will have on the rest of the site.