It is your responsibility as someone doing business to check up on it, and proactively take action if/when rankings go down. To not do so makes no business sens

It is your responsibility as someone doing business to check up on it, and proactively take action if/when rankings go down. To not do so makes no business sense. Of course, if you're just a casual blogger who doesn't care about SEO, it doesn't matter. But if you do care, not checking is foolish