That's really the key. Most people don't need to care. Bluesky is nice and easy for their needs. They just use the bsky.app website and the official Bluesky phone app.
This is in contrast to Mastodon where people were told to pick an instance and not really guided to any one as the primary one (because Mastodon devs/users don't want there to be a thought that there even is a "primary" instance).
People here on HN can claim picking an instance isn't a big deal all they want, but I can say with confidence it is. I'm in various furry artist Discord servers where people expressed their distaste for having to deal with the multiple instances.
