I don’t think it’s wrong to recreate a beloved community, and I think it makes sense to also populate it with content. I just think that posting a copy of Reddit is a problem, and automated posts too often are also not good. At that point you’re trying to force the community into existence rather than having it be organic. I think it’s okay to boost the community a bit, but not to try to make Lemmy the new Reddit.
I will say that Lemmy in general seems very Reddit-like, which is what causes people to try to make Lemmy the new Reddit, so I’m not surprised that people are just trying to migrate subreddits to communities here. I think Lemmy needs a bit more of an identity to avoid that.