It was and still is hard - or at least tedious - for me as a software developer to find out how to use the fediverse and lemmy. I can’t imagine how annoying it must be for a normal user. The one thing I really liked about reddit, is that you can find a well written guide for everything, often pinned at the top of a specific sub. Is there something like that anywhere?
Why do you think kbin is easier and that people should start there instead of Lemmy?
If i had to guess, one single platform is something people new to federation can easily understand. What happens behind the scenes is nothing the average user needs to know or should even notice. Time will change that understanding, this is just the beginning and there should not be a rush because that will scare people away.