Yes. And while I'm of two minds regarding the removal of the Captain, seeing that he allowed his crew to mass like this during an epidemic makes me lean towards approving of his departure. That is exactly what you don't want the crew doing. The Navy has protocols for dealing with epidemics on board and they have public health officers in addition to medical/surgical clinicians. As the Captain noted in his leaked memo, "we are not at war". There is no reason to allow large groups like this to form. Isolate bunkmates together. Let them come to the mess two or three times a day in small groups or even better deliver meals to their cabins. I gather they are in port so there would be many sailors who don't have regular duties to perform. Institute mask wearing (note that none of the sailors in the video are wearing masks). Lots of simple things to do that could limit but not stop spread of the virus. Navy deals with this sort of thing regularly during flu season etc so this isn't their first dance.
I also think the Captain somewhat over called the threat to his crew. There are probably almost no sailors on board over the age of sixty. Probably 90% are less than 35 years old. Almost no one has serious chronic disease. In other words this Navy crew is at very very low risk of serious illness. Certainly way lower than any member of the nursing or medical staff in a NYC hospital. Yes, with 4000+ individuals on board and even a 0.1% mortality rate for healthy sailors, there could end up being a handful of deaths. However, sending 4000 sailors to shore with 5% already infected, it wouldn't take long to overwhelm Guam's limited medical resources so it isn't clear that the sailors would be any better off ashore. Additionally, as most estimates figure somewhere between 30-60% of the world's population will eventually be infected with this virus, it's not like shutting down the carrier is going to prevent many sailors from eventually being infected anyway.
I appreciate that the Captain is loyal to his crew but the logic that led him to write that memo is flawed. Sending the memo to anyone but his immediate superior was also a mistake. Sad to lose a good officer like this but it happens all the time in the Navy when **** happens on their watch. Certainly similar to the principle that virtually every Captain whose ship goes aground, almost regardless of reason, will be relieved of command too.