You can present things on such terms as long as you want, that's not the point.
I know very well what I paid for when I bought civ6, as I did for civ4, as I did for civ5, thank you very much.
I got it for civ4, I got it for civ5, but not for civ6 (yet).
No problem with that it's fine, I paid, as in past action, not asking for a refund here.
The point is that Mr. Shadows, you, me, and a few thousands users on various medias are giving feedback to Firaxis on what we like and what we don't like about how they're using that money.
The point is also to tell them if they are going to get our money for civ7, for an individual example, as of today, they won't get mine.
So I think that Mr. Shadows, you, me, and everyone else have every right to tell them what we still expect from civ6 to influence our decision when the time will come to buy civ7, there is nothing ridiculous in doing that, and having multiple users here trying to dismiss other people opinions using the "it's free" argument make me think they have a very talented marketing department (to prevent misunderstanding, please note that I don't think it's the only one)