zuck can read your whatsapp messages, at this point I think I'd rather criminals and the government read them instead

Nobody gives a damn. What matters is that it works even on a potato.

SMS security only became a problem due to 2FA, which is just one of many use cases, and the failure isn't even technical here but organizational. I agree it should've prompted more pressure to secure the system against SIM-swapping; alas this is too close to the Real World, so the tech industry instead responded with alternative that side-steps the problem by offering zero customer support. No humans to talk to = no humans to social engineer = secure. So much win.

(I'd also say the 2FA proliferation is itself a problem, but that's an unpopular opinion and for a separate discussion.)