I really do hope you don't experience disabling chronic illness... honestly.
There are people (not me, I've found what I can do and do it) who really, really cannot do anything.
Literally existing is the best its going to get - people who still live in their own home or that of an aging parent, who don't quite qualify to live in some sort of home/facility, for whom it is all they can do to complete the basic tasks needed to not die - food intake, toilet, meds.
If you're lying in bed in pain, on heavy medication, no you can't proof read things on phones and, who is it who is employing proof readers who might well be fatigued or distracted - thats a job that requires some skill and a particular education level if not actual qualifications.
One of my freelance roles is illustration and art commissions, if I can't focus enough to do that I might do some original work in the hopes I can sell it via drop-ship sites (for a pittance but its passive income once I've done and uploaded it). There are days when between medication and pain (and Im not talking about the medication FOR the pain, thats an added extra) I can't even do that.
It's a lovely idea that 'everyone can do something' but the reality is, no, they can't. Lots of people can't.
This idea that only the lead swingers and malingerers will be affected is also a double edged sword, as well as naive at best.
It will mean that if you don't qualify for benefits, no one believes that you're actually unwell.
If we had a perfect health care system where missed DX didn't happen, where people didn't wait months or years to begin treatment let alone get a DX, then maybe... but we don't.
It took 2 and a half years of me constantly banging on to Drs that I was not anxious or depressed, I was not having panic attacks, I was not being lazy... I had heart failure, something was horribly wrong, my thyroid was fucked, please help me.
Two and half years later they finally agreed I was actually correct, I did not have 'fibro', I had Ehlers Danlos, I had heart failure, I had damage to my spine (lumbar and cervical) as a result of that, I was not having panic attacks at night I was not breathing properly, drowning in my own fluids, I was in significant pain from nerve damage, arthritic changes in damaged joints, my thyroid was indeed fucked as was the rest of me.
Those symptoms did not on the whole, arrive all at once, I had been suffering with them for YEARS before this, since childhood and early teens (the damage to the joints shows how long my body has been moving incorrectly and chewing itself up!). So yeah, genuinely unwell people fly under the radar despite asking for help, talking about their symptoms, trying to be the squeaky wheel.
It'd be nice if I were an unusual case but I am absolutely not.
But carry on believing that everyone can do something and only the lazy scroungers will be affected. If it makes you feel better. Most people will end up disabled if they live long enough!