I know a lot of people will also want to be the first to comment.
I very much doubt that there are a lot of them. If there were then we would be seeing a lot more early comments than we currently see.
I'm not making trouble out of no reason,
You are not making any trouble, I regard most of the card comments, not just yours, as noise and simply ignore them. There are a often only one or two, and unfortunately also often none, where the poster has obviously watched the whole show and has posted significant observations, something that is not obvious from the previews, and these few I do find worth reading.
sometimes I respect the person who commented first, and I won't say anything!
Not commenting because someone has already done so is, in my opinion, is even more silly than striving to be the first person to comment - but it will have the side effect of reducing the number comments that are not based n viewing the card which can only be a "good thing".