I don't know that it is unreasonable, but I will join in your irritation with great empathy.
All I want is some peace in the relatively small garden we have. If anyone else says 'move to a field in the arse end of nowhere then' I will sob. I would love to do that, I can't afford to.
Today I can hear 3 different lots of radio/music simultaneously, a child next door beating crap out of a fence with a bat, someone drumming with windows open, next door but ones dog yapping incessantly, someone else DIYing, someone else's child screaming. It's like trying to sit and read my book in a circus. Is my book annoying them? No. So why should their radio/shouting/banging about me?
What I have the issue with is the infiltration - my peace doesn't interfere with their life, so who should their noise interfere with mine? It's just about courtesy. Doesn't it occur to these people that I don't want to hear their dog? Their music? If my peace in some way interrupted them constantly then they would complain.
I also cannot stand this 'don't be miserable,it's community living,it's just people enjoying life'. Fair enough but it is always at the compromise of the person who wants peace and never the other way round. It's just not fair.
I really really wish people would be more considerate.