And since not one person in this thread has disputed the fact that lighter accessories exist, I don't know where this aggro is coming from. Though I'm not aware of a keyboard+trackpad case for the 12.9" iPad where it ends up coming under the 2.7lb MacBook Air.
You seem to be irritated by the fact that someone might really require a trackpad and keyboard case for their usage, and that going to a case without a trackpad, and/or getting a separate mouse, isn't suitable for them.
No, I shouldn't have. And this is where you take it from what should be a cordial discussion about the different setups, to a bitter argument, because of your insistence of telling people what to do and making baseless assumptions about them like:
Correct, and I do take an 11" iPad Pro with Magic Keyboard with me some days. Other days, I take my 14" MacBook Pro. Depends on what I'm doing. And when you go between two different devices that each have their advantages and drawbacks, it isn't surprising that you might theorise about a future device that would incorporate most of the advantages of both.
When I have the iPad, I enjoy the modularity, and the cellular, and the touch screen, and the fact it is so light and easy to whip out and start working immediately, wherever you are. I also enjoy the system level VPN, which will stay connected all day regardless of how often the iPad is asleep. When I have the MacBook Pro, I enjoy the full desktop experience of macOS, and the fact I can run any software I want on it, and how once I have it plonked down somewhere, I can simply work faster and better on it.
And merely discussing the idea of a potential perfect future device that Apple may or may not come out with, should not result in someone latching on and making all sorts of passive aggressive assertions and insisting you buy certain current products in the lineup.