That's not a good deal for the virus, now is it? If it kills us all, and any other host it infects, then it dies as well. Don't fall into the trap of anthropomorphizing the thing, like top-level scientists sometimes do. They fall in love with their subject matter and develop twisted mental relationships with it.
Virii do not THINK. They do not have a master PLAN. They are not going to take over a planet they cannot survive on if they kill the hosts they survive in.
Good grief.
Precisely because they don't think so they don't minimize their potency just so we die enough but don't all die for them to live within us. Their goal is to maximize their survivability to make sure they are alive at the end of the day; they don't give a shit about going overboard to kill us all. Just like cancer or the HIV virus, when the cancer is spreading or the HIV virus is replicating, they don't give a shit about the host dying at the end. They spread and replicate as much and as fast as they can just to survive. This covid virus is the same.