Is it really any more of an imposition than your employer wanting to be notified of you need to take bereavement leave or spend a few days in the hospital?

If I’m in the hospital unexpectedly the last thing on my mind is logging into a “my RTO portal”, Jesus

Notifying your employer that you can't work is the most basic of things.

Sure, if you're in the hospital with an emergency they'll hopefully forgive that you couldn't notify them, but if you're sick it's expected you tell somebody.

Disasters also burn down cell towers and other power outlets go off for safety. I haven't had power in nearly 24 hours and I fortunately haven't had to be evacuated.

I can still access internet, but I'd be unable to if I lived even 10 miles south

"I had no internet or power" is an emergency situation they'd hopefully be lenient about.

People seem to be taking this aspect in the worst possible way, when it also functions as a way to let your coworkers know you're ok.

Well, if I'm being a bit cold: I haven't has a coworker check up on me in 7 years. It's only a natural extreme to move towards after the rejection of the whole "we're a family" narrative off yester-decade.

Not that I have strong feelings about that. But none of the companies I worked at have ever felt like I could trust having a job if I had to spend a few days in the hospital.

I wouldn’t log into a portal. But if I could, I would at least send my manager/team a Slack message.

If I have no power or worse, am in the hospital: yes. There's emotional factors with others, but you may not physically be able to access such contacts and portals.