I need to baby the phone if I don't have a case and screen protector. Need to take care because if it drops, it breaks. Even keys and grains of grit are hazards

I need to baby the phone if I don't have a case and screen protector. Need to take care because if it drops, it breaks. Even keys and grains of grit are hazards. On the other hand with a good case, I can be more carefree. Lightly hold onto it with fewer fingers, throw it onto tables, use it as a hammer, etc. It gains robustness, which is valuable.