Are you going to ask me if I want to go from a platform with no ads (3rd party reddit) to a platform where every 3rd post is an unavoidable ad (reddit official) or a slightly more complex but similar community with no ads anywhere (fediverse)? I don't want heinz ketchup telling me that their color is manufactured to be perfect a dozen times a day in my community. I paid a 3rd party app to remove that and I'm not going back.
Asking if it's harder to learn the reddit official app than beta testing various fediverse apps is missing the point. Reddit's app exists to extract money from you and has no reason to improve your experience by its nature. Beta fediverse apps exist to eventually polish the fediverse experience.