Yes, and??? load the plane with the amount you want to drop.
Look at the first 2 passes in this video. The same precise drop by both planes. Given today’s WAAS enabled GPS systems it puts an airplane plus or minus a couple of feet. The Cathedral sat on an island surrounded by water.
Even if they don’t they still have a guidance system that gives them precise control of altitude and flight path and that controls the spread pattern. The advantage of Notre Dame is that it sits on an island. you can either watch it burn uncontrolled for 5 hours from a distance like the fire fighters did or drop water on it from above.
It’s not like it’s a secret what happened. It’s a smoldering shell.