I think the point was just that if we don't help these boys - then they are more likely to fall into patterns of crime and violence - which is a cost everyone in society would like to avoid. What is there to disagree with here?
Likewise there's a very big difference in helping children because we want to maximise their potential and it being the right thing to do, versus helping them because they're effectively holding society hostage by otherwise becoming criminals later in life. You're probably not going to put your best into helping a group you feel holds you hostage and certain solutions, like guaranteed employment in a physically draining but low paying job, might eliminate the threat for society while wasting the potential of the kids involved.
There is a legitimate increase in danger in some areas, but people often view it as victim blaming. The line between 'do this and you'll have a better chance of being safe' and 'if you had done this, you would have had a better chance of having been safe' can be fine.
There are also those who see such advice as misplaced (the whole don't teach people how to avoid X, teach other people to not do X).
Not saying I agree or disagree with either view point, only hypothesizing there could be a common trend of thought underlying the issues some are taking with the original post.
You don't see a problem with phrasing equality in that way?
For an example of a difference which is sexist, imagine someone saying women are less fit for critical roles because they are more emotional, when in fact it is that our society works to repress male expression of emotions and both men and women are, at the core, emotional entities.
To avoid gender, consider an example which uses race instead.
>It would help humanity to also give enough focus on black child development so that we could save their future, avoid the crimes they commit and their languishing in jails.
I've only switched one word, and while some may say it is not offensive, I could clearly foresee some people finding the underlying tone as offensive.