You're not wrong, but purely from a practical standpoint, your data is out there and without a service like this to hold these companies to account, they could

You're not wrong, but purely from a practical standpoint, your data is out there and without a service like this to hold these companies to account, they could cover things up/downplay the situation/be too incompetent to know they've leaked data. An operation like this levels the playing field and lets us collectively hold companies to their responsibilities.