Do you mean that a comment like "Great Post!" should automatically have the same weight like an entire 500 words blog post?
Users will determine if a one liner is worth more than an entire 500 words blog post.
What if trump creates an account and write steem is great, is this worth more than a 500 blog post? Idk users will tell.
Steem is going to be used by hundreds of different sites with very different use case, it makes no sense to say that one post should be rewarded more than another.
I think many people think too much of steem as the website steemit.com, you need to think of steem as the underlying blockchain that could power every website in the world.