Your parents are different ,thinking why they let you gamble seems they see an advantage or they let you explore Its a good thing also that they guide you .Its better that they know your activities so they can give you advise .
My father is also like that. I think I started trying gambling at the age of 16 or 17. He was also a gambler at that time (not a real addicted one) and showed me primedice. He was actually starting to get btc by gambling and then gambling and chatting, thus recieving a lot more from bots than bets. Anyway, I also got a bit interested and tried different bets, strategies and stuff. So, he just wanted to show me what it's like, maybe because he was afraid smb else will and that can lead to worse consequences.