Those in power will certainly prefer your kind of thinking. With your kind of thinking, Nelson Mandela wasn't going to be released from jail. I doubt they were even gonna send him to jail. They were going to quietly execute him. Apartheid wasn't going to be defeated, and black South Africans were still going to be treated like animals in their own country. It was reporting by British media, politicians, celebrities and ordinary citizens that put pressure on the apartheid government to end apartheid. What is happening in another country does affect you. Those people will soon be running to your country when life becomes unbearable.
Same as holocaust, I am sure Hitler was going to prefer that other countries don't report on what was happening so that he can continue to eliminate all German Jews. When he was done, he was going to move to neighbouring countries and continue until he reaches your backyard. By then, it will be too late.
What Donald Trump tweets, does affect me directly because Google Play on my Huawei phone can stop working with one announcement from him. I need to be up to date with the politics of the US. Recession in USresults in recessions all ov er the world. We are part of one global community and what happens on one corner of the world is everyone's problem.