Absolutely right. I've only been on Steemit maybe 5 days and I would estimate I'm due more from comments than the posts. And sometimes - and this backs up your point even more - I've got a higher payout from a comment within my own post than the post itself.
An interesting algorithm that newbies need to understand to succeed.
RE: The One Hack That Got me 140 Followers in 7 Days + Advice from @kyriacos