Your sources are 11 months and 17 months old. I don’t think that refutes your basic argument, but it does certainly cause me to doubt the specific $3M figure. For example here is an article from 6/2023 that describes a new contract between SpaceX and USDoD: https://www.reuters.com/business/aerospace-defense/pentagon-buys-starlink-ukraine-statement-2023-06-01/
It doesn’t include costs, but it’s hard to believe a new contract wouldn’t increase the $3M originally paid last year.
It’s also interesting to consider the marketing impact of donating terminals and service to Ukraine. Does that drive paid service in other parts of the world that exceeds the cost of operations in Ukraine? I think that data is not likely to be available outside SpaceX, although Wikipedia does list pretty steady growth of subscriber numbers (https://en.m.wikipedia.org/wiki/Starlink#Subscribers). So Musk’s support of Ukraine may not be entirely altruistic.
Loop makes earplugs designed to do this. They have different models, like their Experience one is designed for going to concerts that are too loud, but you still want to be able to hear the music properly, just quieter. Or Engage let’s you hear voices, but it helps block out background noises. They’re pretty discreet and most people won’t notice you’re wearing them in my experience.