This painting wasn’t done carefully with a brush or roller, it was done by spraying with a jet of paint.
It took them no time at all to paint this, because they just blasted it at the same time they were doing the rest of the wall, without even caring it was there.
What would have taken time would be to try and carefully spray around without getting any paint on it (or the proper solution, to remove it from the wall before painting)
She could call her parents on the phone and tell them herself, but she doesn’t want to because she knows it will be a difficult conversation.
Therefore she wants to put that undesirable conversation on bro instead, so she doesn’t have to.