That's true enough. But they were cut away because they did not have faith, and you are where you are because you do have faith. So don't be proud, but be afraid.
Make sure that you obey the one who speaks to you. The people did not escape, when they refused to obey the one who spoke to them at Mount Sinai. Do you think you can possibly escape, if you refuse to obey the one who speaks to you from heaven?
I am the LORD, the God of Israel. I promised to always let your family serve me as priests, but now I tell you that I cannot do this any longer! I honor anyone who honors me, but I put a curse on anyone who hates me.