Privacy isn't anywhere near my list of concerns(At least not for myself personally), but the people who do care, care a LOT.
And even beyond privacy, those people don't like the idea of dependence, not learning paper arithmetic and handwriting, etc.
There are also the rare insane ecofascist types who think technology is unsustainable, and we need to drop it all(And then just let people die until the low tech becomes sustainable...).
A lot of people have a certain amount of respect for Kaczynski in some communities.
Lots of people hate vegetarianism without making any claims at all about the health, they just say it's unnatural, and that's enough reason.
I think there's enough people who really would enjoy a computer-free world to make it a trend to boycott this stuff.
I've always thought that Apple is actually largely an anti-tech company.
While in some cases they do have some excellent high tech under the hood(M1 and their zeroconf network protocols), their aesthetics is almost Bauhaus-level minimal, and the feature set is often randomly reduced(Like the one port laptops).
Their UI is very gestural, involving muscle memory and a feeling of "flowingness" not "proceduralness".
There's a slight sense of "You're smart and capable, you don't need to be a tech person and hide behind a computer, you don't need everything to be perfectly compatible, it's fine if some features aren't perfect" in their restrictive app policies and unique connections.
It's not quite "Star trek dream", where no matter what happens, tech is a point of trust that you expect will adapt to get you out of any jam. They want it to be an appliance or luxury piece of furniture. A multi purpose one, sure, but you're supposed to feel like you'd be just fine without your iPhone.
Sure, everyone has a Siri... but it seems like about half love them, and the other half wish it was easier to just live off grid.