If I understand you correctly, you say it is "hubris" (excessive pride) that has cost them any spiritual nourishment from the word of God or the sacraments.
Some immigrants (actually many) have claimed otherwise, like escaping a real danger or trying to give their family a better life. Were they lying? No one, especially the Catholic Church, is saying that a country cannot regulate its borders. They are saying that it should be done humanely and as Catholics we believe that the sacraments are just as important as food, water, and shelter.
Your COVID argument rings hollow to me because I recall drive by Eucharistic services, masses outside in parking lots with people/families sitting 6 feet apart, no taking from the cup (consecrated wine), televised masses with a spiritual communion prayer, and other means to bring Christ to the faithful.
Leave it to the Jesuits to bring up a real concern we as Americans should really answer. If we are going to detain people here illegally, should we not also ensure their spiritual needs are met as well? You say there is a way to do that, however, if you read about this incident, their requests were denied repeatedly. Thankfully, they understood the message of Christ better than most and did a good thing- bring Christ (literally) to the people.
Hopefully this gets corrected and the people can be fed spiritually.
ETA: I re-read your question about COVID and I believe you are citing a situation in which a Church (don't recall which) required masks among other measures to attend mass. Not sure of when this occurred, before we knew anything or as we were coming out of the shutdown- in any case, not being a doctor but I do recall that COVID was especially deadly to persons with respiratory issues. In fact, there was a lot of confusion about the methods of prevention of spreading COVID that turned out to be wrong.
In any case, I agree that we should not politicize the Eucharist at any point. I recall having to wear a mask as well in the communion line and then unmasking to consume, then masking up again. Seemed silly to me at the time because I figured I compromised myself at that particular moment- but I complied out of respect for others. Maybe that is the difference?