That's fair, I guess in my ideal world, law enforcement would just act on the factual information rather than being biased by the fact that a Facebook person reported it as a concern. But as evidenced by things like swatting, police are certainly not the best at responding to reports in a calm and unbiased way. I guess my hope is that law enforcement can learn to appropriately interpret and respond to these reports (including deeming that it's actually not a concern), but maybe that's unrealistic.
They would like to cover their asses in case something bad happens.
If they didn't act, they would be susceptible to lawsuits.