I think it is very evident that you are writing from an Australian perspective.
Australia, if I am not mistaken, is a country that has resorted to very far-reaching measures to curb the spread of covid. Isn't there a total travel ban imposed on all Australians and you may not even leave the country? I might be wrong, but am pretty sure that the measures taken by the Australian govt in that regard have been very ... radical, and the infection spread was thus very minimal.
With that in mind, it is understandable why you feel that absolutely no risks of transmitting coronavirus should be tolerated, and getting the virus may seem like something dreadful.
You have to keep in mind, though, that in other countries, Russia included, the attitude to the virus has been much relaxed. No one is putting the entire areas in quarantine if there is a documented case, the contact tracing is minimal or even non-existent. Masks are often neglected, restaurants are open, private parties are being thrown etc (in Moscow at least) - whilst there is massive community spread. As a result people do get sick much more frequently, but it is not seen as the end of the world. People are no longer as scared to get the virus, so the guards are off, and this is socially accepted.
I think this lax attitude is prevalent amongst not only the skaters, who are young and fit, but also the coaches in their older years (Mishin). So I think you are ascribing everyone feelings and fears that they may very well not be having at all. My impression is that covid is taken much, much more lightly in Russia. Whilst it can seem bizarre to you as an Australian, it seems pretty reasonable for me who lives in Sweden. I mean... yes coronavirus can lead to serious complications but it is not bubonic plague... You criticising so passionately Anna, RusFed etc for not being cautious enough seems, to me, a bit disproportionate.