Let's look at that original claim -

"As with smoking, alcohol, sex, drugs etc

Children who are smart enough to get access to a given vice without getting caught are more likely to be mature enough to be able to cope with that vice."

There are at least two problems here. The one I've focused on first that you seem so keen to dispel, is an assumption that there are smart kids overcoming a challenge. 'Roy' is an extreme, but there is a whole spectrum of low-oversight conditions that are likely to lead to kids getting access to alcohol, tobacco, drugs, having sex etc, which are nothing to do with smartness or challenges and are much more to do with shitty parenting and neglect.

Then there's the second problem. Let's focus on tobacco but I believe it's likely to hold for other drugs - even if we allow that children getting access to tobacco are 'smarter' than those who don't figure it out, and are overcoming various obstacles, that doesn't actually imply that they'll be better able to deal with the consequences. Just like how a high IQ doesn't always mean someone is necessarily good at crossing the road safely or tieing their shoelaces.

In fact there's a variety of research about nicotine's effect on developing brains and how the earlier people are exposed the more likely they are to be more addicted for longer. This is the opposite outcome to the original claim, kids who start earlier are in fact demonstrably less likely to be able to 'cope' with the vice.

The whole claim is nonsense.

[0] https://pmc.ncbi.nlm.nih.gov/articles/PMC3615117/ [1] https://www.tobaccoinaustralia.org.au/chapter-6-addiction/6-...

(edit - I'm not making specific claims about cybersecurity or access to tech here, I just think the analogy is pretty seriously wrong in itself)