One thing you hear sometimes is that they only really contact people once they have FTL because then it becomes impossible to just ignore them.
Which raises the question, is ignoring people’s plight something you want to do? I guess its a trolley problem. It also sounds kinda imperialistic.
The zoo hypothesis is even more imperialistic. A civilization should have some rights regardless of whether it has FTL.

But the core point of not being imposing is noble.