Why can't it be both?

If creators could easily reward those genuine comments on facebook, youtube, reddit, etc, wouldn't they?

It's up to the authors to decide what they think is genuine and what isn't, if they want to reward comments that are there just to get part of their post rewards then they can, others can judge the author and user's comment based on that. If they don't want to they can ignore them or just leave a reply and not vote.

Beats having 50 different command bot comments with nothing of value being inserted in the comment nor value being transferred from the token command.

You could also think that a big reason many don't care to comment but focus on posting is that close to no rewards go out to comments compared to posts, @commentrewarder attempts to change that to turn creators into consumers as well as we severely lack it. On top of giving those users who can't reward comments with votes a way to do so with sharing their author rewards as tips.