Anon OP, you seem to almost be asking a valid question about something which exists in the AFL, not sure how many other sports have a 'Father Son' rule, which could work in the NBL I guess.
But then you destroy the integrity of your attempt by making statements which obviously lead us to presume you have some beef with some kids given what you see as a free ride ahead of others in the sport. You are making it personal!
Sadly, yes there sometimes appears to be decisions made especially at junior level that prove to be either bad decisions at the time or they are revealed as favoritism later, however this is not what a father-son rule is about, nor should it be.
If a kid coming through the ranks in basketball is good enough, they may get an NBL gig, no matter who their father is, but if they are just not going to cut it don't worry because they won't last long in the NBL regardless.
Even in the AFL you have some examples of clubs not taking the father-son option on a player, sometimes this comes back to haunt the club, other times they have made the right decision, but they still have to make a decision based on the potential and skill of that player because everyone in the football department is made accountable if the player is found wanting.
I would be less concerned about whether a father-son rule gives a player a free ride and more concerned about having my kid work hard to get the best out of him/her self, if I were you...
Anyway, father-son rules apply in a draft situation, the NBL doesn't have such a thing, so any club is free to choose who they wish, making the topic kind of a moot point!