Ok, so I just guess that you use older version of the theme, because in newer ones, that link next to the post title "leave a comment" is hidden if there are no comments. So you see, if there are no comments even scrolling to the top would not help :)
I would suggest to not encourage readers read articles on the index wall or category listing. In the edit screen of the post you could place your cursor where you want to cut the post and click MORE button. This way your index page would not be overloaded with long content and users would read articles where they should do this. Plus in the individual post view font is larger, so it is easier to read.
Would you like to try it?
See my site: mtomas.com for an example.