It goes under your sink. When it breaks, water gushes out. And when the shutoff valve is locked in a cabinet in the hallway, it gushes for 15 long, excruciating minutes until the plumber dude shows up. You've been disturbed cooking dinner, and instead you'll spend your time baling water.
When the plumber dude can't fix it, you'll be without water for the evening. That means after a few hours of mopping with a festering mop, you'll be unable to shower. And it will be very, very unpleasant.
And that was supposed to be your night relaxing. You really need a key to that cabinet in the hallway.