I don't understand people who keep criticizing the KBO popularity and salary structure

Don't the people saying those things also live in a country where you can take home over 2 million won a month just by working a part-time job at minimum wage?
And obviously, they aren't receiving that money because their efficiency is better than citizens in developing countries who would struggle to earn even 500,000 won for the same work. They receive that money simply because they were born in Korea.
Relative differences based on environment naturally exist, so I don't know why everyone is being so resentful about it..