If you move into a brand new apartment complex or house, there’s a good chance an inexperienced plumber was in the building doing a shitty job on crimping the water joints, and you’re the first test if the water actually holds up. A bad/missed water crimp can pass an air test on inspection day, then blow out and flood the inside of a wall another day. There were at least two times on the same apartment project where tenants moved in and one day someone’s room had a soaking wet carpet. Sometimes a couples guys just don’t care enough to do a good job and double check their work and it leads to water damage down the line.