I don’t quite get your logic about ‘age of account’

I created a Steam accounts for my kids when they were little (2 and 5). The oldest has started using his account, the youngest will probably start next year. XBox used account activity - and that’s a better test. Having 15 years of gaming history is a better test than a 10-year-old account that only started seeing regular use 2 years ago.

Going by age would mean that by the time the account is 18 your kids would be 20 and 23. So when they turn 18 they would have to wait another 2/5 years before this method would work for them.

Using account activity, if you’re 18 but only started gaming at 12, you’d have to wait till you’re 30.
Why would that be better? Imho, that’s worse.

Aside from the fact, that neither is actually a confirmation of a person’s actual age.

if it has seeds (in nature) then it was a fruit, otherwise it was a vegetable

Many vegetables have seeds.
Pumpkins are already in the example, but think peppers, legumes