Greetings,

Do parents have the right to make life choices instead of their son/daughter?

Parents interfering in children activities, is correct but not always. Yes, but imposing your decision on your kids is wrong, just give your children the correct opinion and your thought's on matter rest is on the children wheather they want to follow it or not. Best is following it, plus one thing not to be ignored there is generation gap among both there for parents should watch what they say.
_{I'm 19 and i appreciate my parents looking in my matters}

Should parents interfere in their children's relationships?

Yes if they think it's toxic, rest no. We all have different lives and way of thinking.