Yes, FannyCann that is surely how safeguarding should be working.
The author suggests that we should "Think of the men who work in our schools, and realise how insulting it is to suggest that they would be a danger to the children they work so hard to support". What kind of culture is being produced in a school if to even think and suggest that staff who work hard could be a danger to children is seen as insulting. How on earth could a child disclose abuse by a staff member in this environment.
Children needing to disclose abuse will usually be very fearful about the consequences of disclosing, so if they pick up on the idea that the school views it's staff in the way that the author does - as good and trustworthy people - then the chance of the child feeling safe enough to disclose will be zero. I can't believe that anyone who has taught in schools would write "The people employed in schools are good people, the children are safe in their hands and we trust them"
The author does say that in order to ensure safety then if we develop doubts about a person then we should thoroughly investigate them. However she does not seem to realise that not only is she suggesting a culture where such doubts may seem insulting or go against the grain but also that many of those abusing children will have also developed ways to groom the adults into ignoring any doubts about the abuser that could arise. It may often be the ones who work the hardest or are seen as the most 'devoted' to all the children, who are abusing them.
The author also ignores how a child may be groomed to either want a particular person to care for them or fear the consequences of refusing a particular person.
This article demonstrates to me the the author has a really poor understanding of safeguarding and also that she prioritises other things such as inclusion and the feelings of staff above safeguarding.