I've used some of the products containing microbeads and was flabbergasted when I learned that they were plastic. It was my dentist who asked a pointed question

I've used some of the products containing microbeads and was flabbergasted when I learned that they were plastic. It was my dentist who asked a pointed question during a routine cleaning: "Do you use Crest toothpaste?" I answered yes and was informed that some of the plastic beads from the tooth paste had gotten stuck in my gums. The dentist went on to explain that she'd sent in many complaints to the company but they still didn't drop that ingredient. What weighs on my mind now is why a toothpaste company continued to use microbeads after learning of the externality. Did they have too much inventory to sell. Were they afraid that discontinuing that exact product would upset customers? Did they think that owning up to the mistake and correcting it would draw too much attention to the mistake? Personally, my respect lies with any entity that can own up to and correct its mistakes before it is forced to do so.