You have a problem with having to take 2 seconds to decide how much to give someones comment?
Thats the laziest and strangest complaint i ever heard.
You get to decide what something is worth to you. Not all comments are worth the same and not all posts are worth the same to one person.
Your stake lets you decide.
Also, your slider is saved to last comment vote % as a default so you dont have to think too much.

As i said... Such a strange complaint.