It is possible those are also the reasons. I have no experience in the industry, so it was just speculation on my part. I will note that just because one is a nurse, that does not mean that nurse is working with Covid patients. It seems though, that everyone automatically assumes ALL nurses are dealing with just Covid patients. The media has not helped in that mindset either.
You may be right in that not every single nurse has dealt directly with a covid patient, but I can tell you that covid, and the whole response to covid, has impacted the entire medical profession from the top right down to the bottom. Many hospitals are of course being slammed as they are absorbing lots of transfers and walk ins from a large area, but it is not just hospitals I can assure. In fact, I would say that skilled nursing facilities are being tremendously impacted right now, mostly because of new regulations, testing, reporting, admissions, referrals, coordinating with doctors, increased meetings and demands from corporate, dealing directly with family, all of these aspects have been tremendously impacted by covid. Many of these facilities already work under a lot of stress just normal day to day due to very tight staffing restrictions. My wife for example can not just add an extra nurse to every wing as she would like to do, because that would exceed nursing hours. Nevermind that the nurses on those wings are completely drowning, cant accomplish their jobs, even working overtime everyday, and get further and further behind everyday. I think the average person would be shocked to see the work load many of these nurses face every day. Not just all the care for the patients, but the massive documentation, charting, computer entry, coordination with doctors, follow ups, and doing all this without being allowed to miss one treatment, one wound care rotation. On top of being pulled constantly in 5 directions you have to maintain a high level of accuracy. One wrong dose, one mix up on medication, one brain fart on the medical care of a high acuity patient can mean big trouble. There are lots of professions that work their but off. I used to work construction and irrigation 12 hours a day and it kicked my butt, but atleast there I had one job, one overall goal, and just had to show up and perform. Nurses need to be superhuman to be good at their job, and thats honestly why the turn over rate is so incredibly high in nursing - most people simply cant do it, they cant manage the demand, it chews them up and spits them out.