I will make it easy for you to understand: don't you make money from steemit?? I think you do. and I think steemit platform is not your work (unless you are one of the developers of this platform)
so can we say the same about you making money from someone else's work? because if not for steemit team's work you wouldn't be able to make money also
PS: I am not saying you shouldn't, I am just trying to make you see that you are making also money from somone else's work