large companies who can afford the security infra to do those checks and store that data
There is no such company. This is just another way to ban "harmful" content. Verifying your identity and age to access restricted content is practically guaranteed to result in your identity being compromised within your lifetime.
You need to factor in other economic factors. How much is this in terms of median salary? How much is this in terms of child care costs? Currency conversion is based on how much the currency is worth in the other country.