That's not even remotely true.
You can have a good stable business that didn't have plans in place for 3+ months of accrued working capital to sustain a non-operational business, because who would've thought there was going to be a worldwide pandemic like this.
A lot of businesses work on the idea that they will be constantly open to do business. Which now seems like a high risk in hindsight, but then again do you have asteroid insurance?
I am just working off the article.
The gadget shop - meh, never bought from them, always looked like junk
edcon - in trouble for a few years. Personally me or none of my friends shop at Edgars....
flight centre - dying breed, most people buy online
caxton / associated - dying breed, magazines are over priced and usually full of adverts.
time freight - not sure about this one - but delivery companies should be doing well? Or have not adapted quickly enough?
rebel tech - sorry to hear, but probably did not have the scale to survive
comair - understandable - all airlines around the world are affected
Of course businesses are suffering, but to just blame all their woes on one thing is not the full story.
Restaurants, hotels, airlines, bars etc are another story and can blame covid