You may think that metric system is better because it goes by 10's, but that is its only redeeming factor. The imperial system is better for many reasons.
Inches measure dick size better than cm
Feet/inches measures height better than cm. 6 feet sounds much better than 183 cm
Fahrenheit is superior. 0 means fucking cold and 100 means fucking hot. For Celsius they base it off of stupid BS water freezing and boiling.
For measuring pants size, inches always do better.
This is the most important one. Pounds are better for lifting. One whole plate or bar is 45 pounds or 20.4 kg. Again, pounds works better.
For conversion, metric works better, but for real life use, imperial is far superior. The only thing metric is better at in real life is measuring volume.