It’s somewhat intrusive to suggest that my business should run according to your principles. Are you familiar with the strongest form of business, the family firm?
By whose measure is it the 'strongest'? That suggests it's somehow more effective.
Counterpoint: It's intrusive to a worker's life, career prospects and their family if you decide to hire a family member over someone who (and I'm adding this in purposely) - objectively more qualified - than the family member.
I love my siblings and they are intelligent successful people but I wouldn’t want them as coworkers because they don’t have the necessary skills and experience to do what I do.
Slavery is legal in the US in the case of prison labor.
I’m sure someone exists who would employ minors given the opportunity.