I guess it depends on the store...in the early 2010's I had my screen repaired for free...but within the last two years when my girl cracked her phone they haven't been as lenient as they used to be. Likely depends on worker and store culture. Now I just get applecare for her clumsy ass.
I've only cracked my screen once since the advent of smartphones...if people just don't walk and use their phones at the same time would avoid most accidents.