

every cafe that only distributes its menu solely via Instagram will not be visited by me
There’s a good chance I’d walk out over that too. I’ve never encountered it in the USA or Germany, but the author made it sound common in Australia.
you can write an SMS or call me
The author specifically mentioned people telling her “Oh I don’t text, do you have Insta or WhatsApp?” This is also true in Europe; WhatsApp is essentially universal, and some people have to pay per SMS sent. Some people also have another messaging app (Signal is reasonably common among my social group), but that won’t cover everyone, and group chats with more than three or four participants just aren’t going to happen.
If you are not willing to do that much, you do not really understand what meta is doing.
The average person does not really understand what Meta is doing. I do, and I think the author does, but neither of us is in a position to change the behavior of a majority of people in our regions.
If you’re willing to endure a lot of inconvenience to maybe move the needle a tiny bit, I admire you. It also differs from place to place; if no restaurants exclusively put their menus on Instagram where you live, and most people do use SMS, then it wouldn’t be as painful for you as for the author.