I think 16 year olds having a say in society is a great thing, I was living independently at not much older than that.
I’m a firm believer in anyone that pays taxes should have a say.
Again this just comes down to people’s perception of what justice is, obviously a 23 year old is more likely to be receptive to support and interventional methods than a 43 year old.
Suppose it depends on your outlook, whether you prefer vengeful sentences or a balanced way forward.
Personally I think a lot depends on the circumstances, I don’t think a 19 year old who gets into a fight should be treated as harshly as a 40 year old in general but each case is specific.
Biologically and psychologically there is a huge difference between young men and adults, maybe you think this shouldn’t matter when it comes to justice, but western legal systems clearly do.
Even going back 25 years sheriffs sentenced young people differently, to be honest apart from a few really controversial cases I haven’t seen much change.