Then you have been extremely lucky and somewhat selfish, ermen. I pay business class at my own expense, usually once a year, and the last thing I pay for my ten or fifteen grand is a noisy child nearby. You think it is fair; may I tell you, ermen, that I also have children, and I was considerate to my fellow man, when they were young, so the furthest they travelled by air until they were hushable - and importantly - until I paid for their seats was BNE-ROK. It is achievable, ermen, you just have to be fair to all and reasonable. The person across the aisle may be getting a freebie on his company, but just as likely he'll be me, a person who has paid several thousand dollars out of his long-earned retirement money to go on the trip of a lifetime in the hope of a quiet and comfortable flight.
You may be the extremely unusual person who is considerate, but going on the reaction here,
a) they're all young and have or are thinking of taking young children (as in extremely young), or
b) they're not paying for it, or
c) they just don't care about others, especially their elders.