Mainly most parents hold the belief that BTC, lacking government oversight and approval, is primarily associated with money laundering and illicit business activities.
I could guess that was the problem, it is sad that at a time when it should be very easy for people to do their own research and get the right information, they make their decisions based on what they read online from anti-bitcoiners who constantly attack the network. BTC with its public ledger and transparency in tx's isn't as good for money laundering as people think, except it is done by someone with a very good understanding of the network. Laundering money with cash is so much easier, but people think BTC is the problem.