You cannot have responsibilities without having the necessary rights needed to fulfill those responsibilities. Its two sides of the same coin.
That line of reasoning also leads to legitimizing coercion, corruption, compulsion, and a large number of other intolerable outcomes that have throughout history become self-destructive.
You may want to further educate yourself from published statistics before pushing unbacked value statements like its 'usually good', and 'abuse is common' [0].
Take a look at the pie chart broken down by category in the report, what percentage of false reports do they say they receive...
What percentage of reports, in aggregate, find some form of confirmation. Keep in mind, 'Unsubstantiated' doesn't mean what you might think it means [1].
Given police refer these issues to CPS for investigation instead of investigating themselves, and given statistics often follow a distribution curve, are either of those answers you provided reasonable, likely, or expected without there being some profound issue with the system being measured.
You really should stop pushing irrational misinformation, and other limiting beliefs. All this comment's done is add to the noise in a fundamentally negative way. Karma has a way of coming back to you three fold over time regardless of whether you believe in it or not.
[0] https://www.childwelfare.gov/pubpdfs/canstats.pdf, Statistics [1] https://www.childwelfare.gov/pubpdfs/decisionmaking.pdf
It's the children's rights, freedom and agency that are being infringed upon. Even if a parent was unjustly restricting their own child from going outside, instead of calling the police on someone else's child, that would be just as wrong.
On average, I think CPS interventions are usually good. A parent with unchecked power is the ultimate form of totalitarianism, and abuse is common.