Look man. I think you provide an interesting perspective on this matter, but it bothers me greatly that you used the word "cyb" for cooking.
How the hell is cooking the most cyb thing to do? Don't get me wrong, I don't want to argue about what's cyber and what's not (this isn't /cyber/), but you've simply substituted the word cool with the word cyb. C'mon man. Next thing you'll be telling me that gardening and/or knitting is the most cyber thing ever.
Am I saying these skills are useless? Of course not, they can be essential and very valuable. But that simply doesn't make them cyb.
Why is soylent cyber? Well for the reasons you've listed. Dependence on megacorps, replacement of traditional skills etc.
I'm not saying that cooking and soylent are bad and good respectively. In fact making your own soylent is very common:https://diy.soylent.com/
But anyways, I digress. You raised some semi-valid points, but I think you only proved to me how cyber soylent really is.
I mean, don't tell me you want to start reading a cyberpunk novel that begins with the protagonist cooking beef stroganoff.