I'm struggling to understand what you think should be different here. You're complaining about the "All" feed, but you can also view only a "Local" feed from your home instance, or "Front Page" which only includes your subscriptions. At least this is how Connect has it set up. The two alternatives seem to be either you see nothing until you subscribe to a community, meaning you have to seek them out on your own, or your app/Lemmy creates a "Default" community list, favoring some communities over others and becoming more like reddit, both of which are terrible options.