The idea of copying or pasting someone else idea is wrong. As a writer you should be able to come up with your own idea no matter how poor it is, and also you should learn to make good research on things and improve in your creativity, rather than stealing. Plagiarism, is a form of theft and shouldn't be practiced any where.
I agree with what you said. this is the same as taking other people's rights to be our rights without having to think anything we easily create blogs by copying what other people have made