@mdszy qoto has this to say about that:
"NOTE: This will not circumvent a user's privacy settings. It only delivers the same notifications as following someone via existing RSS feeds would allow, that is, it brings the RSS feed of their public posts into your home timeline this features behaves the same as the default functionality on non-Mastodon instances such as Misskey, Friendica, and Pleroma"
But I understand why you'd want to defederate based on your other reasons alone.
This Mastodon instance is for people interested in technology. Discussions aren't limited to technology, because tech folks shouldn't be limited to technology either!