How do I get my parents to say yes to their concerns to a Metallica concert (updated ver I think)

So here is an updated version of whatever I last posted here.

So I’m still dying to see Metallica next year, but my parents have even bigger concerns. My mum acts too ‘religious’ and is scared of the ‘drunk’ or people doing ‘illegal activity’ whilst my dad’s concerned of the money. I tried my ABSOLUTE best to answer their concerns and did some research but they still don’t believe me.

Right now there’s less than 20 seats left and I know that it’s gonna get sold out if I wait till January (this is for the 2-day ticket). I can’t get any seats together for either night since they got sold out even if there were any single seats left.

Even if I told them that I’m going with dad for the 2 nights, is there any way I can make them 100% say yes and book the tickets REALLY SOON???

(If I don’t actually see them I have System Of A Down as backup instead once tickets get released)