This is a defect. There's a service program for keyboards with problems. I took mine to be serviced and it was returned without repeating keys or stuck keys.
https://www.apple.com/support/keyboard-service-program-for-m...
https://www.apple.com/support/keyboard-service-program-for-m...
It seems so very uncharacteristic for Apple to ship a product that you need to use in a clean room for it to work properly. I don't like to baby my products, they will develop dings and scratches over time.