There's a good chance that's not the case.
Like most people, you use too much toothpaste on your toothbrush.
You only need a dab of toothpaste for effective cleaning.
TV commercials show you brush-sized toothpaste for 2 reasons:
1. Because it's pretty.
2. Because it makes you use more toothpaste.
Considering the amount of toothpaste used per family each year, this is a significant saving.
Because a tube of toothpaste is still worth around €1.30 (link to Amazon).