There is nuance to the issue, of course being protective is good. But there is absolutely such a thing as being overprotective. There is such a thing as micromanaging.
My mother was overprotective to the point that if I wanted to watch a movie in cinemas at night at the age of 21 with a group of my long term female friends, she wanted my Dad to stay with me. Because I can't be trusted on my own. She was so overprotective that me walking 10 steps ahead of the family was "too far". Again, when I was over the age of 18. That's insanity.