Bets, I cannot speak for all the other cities in which passengers were stranded, but I can give a perspective of what was happening locally.
Nashville, as did many other cities/states, had some truly unusual low winter temps, which when we typically experience such it is usually well into January and/or February, even then rare.
What happened: Of course, with icy/snowy roads resulted in a high number of vehicle accidents, power outages were not uncommon, many frozen water mains, many frozen pipes in homes/businesses, some senior living facilities, and apartment buildings......then the aftermath as they unfreeze. And, there is also a relocation of a relatively large homeless tent-type community that took up residence in a Metro Public park over the years (with some resulting/drug/loitering/crime issues that went along with that)....and that group is just one of a much larger homeless problem that seems to have grown as Nashville has grown. But, trying to make sure homeless people, some who cannot make wise decisions for themselves, did not freeze in the streets is always a resource consuming effort.
On top of all that, because of the exceptionally high demand for electricity in several of the states whose power providers are fed by the TVA, which had issues at two of its plants, some immediate multi-state rolling blackouts (of 10-20 minutes each hour) were implemented with little initial warning (they had to respond that quickly to keep the grid from going into grid-lock).
So, yes, it would have been wonderful for our city, its not-for-profits, and we as citizens to step up to reduce the problem by offering travelers places to stay, but a lot was happening all at once.....the Southwest issue just seemed to drag out (for all the obvious reasons). People were in a WARM airport, at least.
Then add to all that, the pandemic, actually triple-demic is still happening, with upticks also with strep, but not to the point of calling it a quademic. Can't speak for all households, but my household (which typically hosts lots of gatherings has done none of that (except for the rare hosting of a few friends on our patio outside), we have not dined inside a restaurant, and we are doing 99% pre-ordered curb-side pickup of groceries...and never stopped wearing masks when going inside public places. The vaccine rate is not high in Tennessee (booster rate pitiful), and about a month ago, we were referred to on the national news as the epicenter for flu (apparently not the case right now). So, while one might consider opening their home to strangers (with proper vetting to make sure they are not whackos/criminals...yep, those people do fly), during a pandemic, there might be several households hesitant to do that. And, quite frankly, if I were stranded in an airport, I likely would be hesitant to go into an unknown private home for the same reasons.
With the disclaimer that I was half asleep, watching the local news last night, I saw some statement from either the airline or the airport, and then a statement from the woman or her family (who was initially warned she could be arrested). Both statements were kind and thoughtful, and the woman or her family's statement basically said (NOT IN THESE WORDS), but the general tone was that they are not letting the actions of one person put a cloud on Nashville (they were much kinder and upbeat in the actual words used). So, I guess all is well that ends well........and I sure hope all travelers have arrived or are on their way home (or to where they were going to visit) and that their luggage has arrived safely (or is on its way)..........and, of course, that all the reimbursements go quickly and kindly.