I can completely understand wanting to differentiate from Reddit, but to me, this is a matter of convenience and priority. Putting right after the article implies commenting on the article is emphasized. Putting it at the bottom of the comment page implies a want to comment on the comments.
Maybe there’s a reason I’m not seeing here? Am I just dumb?
I also like that it’s at the bottom. It has led me to read more comments than I usually did on Reddit, which is just another subtle way kbin/lemmy helps drive engagement when compared to Reddit. I’m glad the choice is there via the enhancement scripts for those who disagree, though!