I don't want to be argumentative, so please forgive me if I come off that way. I certainly agree that we can be saved in the desert, in the forest, locked away in a dungeon, etc. But I also don't think that is the norm. Saint Zosimas and the monks would spend Lent in the desert, but they were sent there as an obedience. Saint Mary ended up in the desert because the Mother of God told her she would find her salvation across the Jordan. So if your bishop has said to go into self-isolation then you do so out of obedience, but you also do all the other things he tells you to do with regard to prayer rules, etc. My bishop has not told me that we should be doing such things. And what we do as priests will necessarily be different from what the laity are called to do.
Again, I'm not trying to be argumentative, but when we refer to great Lent as "the forty days that bring profit to our souls" I think we should understand that even a few weeks can make a huge difference to our spiritual lives. We are potentially looking at far longer than the six weeks of Great Lent. I am not suggesting that we just throw caution to the wind, but that we not neglect our spiritual lives in the interest of our physical lives.
I am not one of those folk who think this is a hoax, or no big deal. I just happen to think that we can't really be Christians if we are hiding ourselves away. We can't visit the sick if we are afraid to encounter them. We can't abide in Christ and Christ in us if we don't eat His flesh and drink His blood. We can certainly pray, and should do so with great fervor. But as Christians we must figure out how we can live out our lives in Christ even while doing what we can to protect others. What I see is a lot of fear on the one hand and stupid defiance on the other, and not a lot of cautious courage. We wouldn't want to see Doctors and Nurses go into self-isolation and let us all sort things out for ourselves. Christians should also be courageous in demonstrating the faith through their deeds, sharing the gospel with others, and caring for the sick and dying. It's what Christians have always done.