>Imagine what would happen if someone would try to liberate oppressed people in China.
My original point is very much meant to counter absurd hypotheticals like these. No other sovereign nation on Earth at the current point in time would ever dare to "liberate" China, because this is no longer the 19th century, and so China is no longer weak.
Soft power may buy you hearts and minds; Japan and South Korea are good examples of that in Asia. But hard power is what truly matters at the end of the day when it comes to asserting your geopolitical interests, and that's clearly the philosophy China has decided to operate under.
The U.S. is clearly not oblivious to this reality either. Even if we grant your moral arguments that Maduro was a horrible dictator deserving his fate, the fact that Trump and his administration chose to act when it was geopolitically and domestically convenient strongly suggests that "taking out the big bad Latino dictator for the sake of humanity" was not the primary motivation.