It’s something reddit was actually good at. Tons of people used to find reddit way too confusing because they didn’t understand subreddits, so reddit responded by making a list of default subs for the “don’t know don’t care” crowd that makes up 90% of users in practice.
Sure, it opened a different can of worms in that it tanked the quality of those subs when most users didn’t really get the pount of subs, but it massively lowered the barrier to entry on the platform.
We have a much higher barrier to entry with instances, and I really think something should be put in place to lower it.