Water pump damaged by mechanic?

Hello! I drive a 1998 Nissan 200SX with about 100K, 1.6 L engine.

i have always done minor repairs on my own, and thus had never been to a mechanic in my new home of Los Angeles until I had an oil leak that required them to fix the crank seal. A couple of days later, my landlord noticed I was leaking coolant. Turns out my water pump is leaking.

would it be plausible that they damaged the water pump while doing the other repair, or is it just a coincidence?