The crisis line employees are LOOKING for a reason to send somebody to your address. They will talk callers into saying something, without the caller realizing it, that gives them a reason to send "help". They really just want to take somebody into custody, that is all.
I don't know about other places. In my state in the USA, there is no liability for hospital employees, psychiatrists, clinic employees. They can release a person that commits suicide an hour later and they can't be held responsible. The law says they can't be. But the assholes behave as though they are liable. They either don't know the law, or they just want to lock a person up just because they want to.