You may be right about drone, helicopter and other flight application batteries (to save weight) but 2s, 3s and above batteries for r/c cars and trucks are usually within a rugged hard shell to protect them from inevitable shocks. Examples: https://www.amainhobbies.com/rc-car-lipo-lihv-batteries/c139...

Many people store their batteries in an ammo box or "lipo safe" such as these to protect against fire: https://www.amazon.com/lipo-safe/s?k=lipo+safe