That argument, Nyom
Danilo , is actually based on hypothetical ideas and assumings, selfish, greedy, discriminate based on bias and daily mood. As for the sample of origin it turned out that no case of illness on corona was on board.
It's certain a very western/uninstructed argumentation to justify akusala action on assuming and fear. That's not at all the way kusal could ever work. There are four roots of wrong doing: greed, aversin, ignorance and fear.
How can one reject help and send refugees away? That's totally wrong and does not fit to proper seasons for generosity.
Maybe Nyom likes to investigate the reasons of his thinking as well why such an reaction when invited to rejoice with good deeds and occation to feel sympatic joy also for the gifted gains?
It's somehow like strange press which seeks also for critical argument, driving all back to seek for hunt after Chinese... certain envy, and aversion, or?
Don't harm oneself at least means not to destroy ones own goodness, act so that precepts and duties are violated.
It happens often in non-dhammic areas, that even special beggars are rejected out of fear.
How does the believe arises that the Buddha warned of being generouse if fearing what ever lose?
It's pretty known that such ways of thinking lead even to kinds of racism on so called rational arguments: black people are drug dealer, so we reject them. Or things like deportation of imperfect.
(One, for the most, doesn't dwell under people with right view and good assosiation if on places like BSE).