But that will be an adult who has grown up never being able to legally buy cigarettes, so it will never come as a sudden shock to them. It will just never be part of their lives, when they're 18, 28, 58 or 98, unless they deliberately choose to break the law.
Just like spouses where at least one of them is 89 still qualify for a Married Couples tax allowance, which younger people do not. Imagine telling a very mature person aged 88 that they're too young to get that! But they've never had it, so it's as irrelevant to them at 88 as it was at 18.
I would hope that, instead of it being seen as a great freedom and benefit that they're denied, it will be viewed as a bad relic of the past that they and their generation (and future ones) have been freed from. I think, before long, it will become another of those things that fall into the category of 'why on earth did we ever think that was a good idea?'
When we eventually stopped sending children up filthy chimneys to clean them, I wonder if younger children grew up heartbroken that they would never be allowed the 'privilege' that older people had 'enjoyed'?!