I don't know, you're the one speculating about whether or not they do, I'm just going along with it.How is it not the point? If the original records exist, then they can be used for statistical analysis, which is what you are concerned about - correct me if I'm wrong.
The poster stated she's had her "birth certificate" altered, which I assume to be the original. And if it is, how many "layers" of truth does there have to be? Is anyone interested in pursuing records going to have to look at each one to see if there's a "hidden" deeper record somewhere? Do we have several birth certificates hidden away in various locations as each life change is made?
No, we don't. Because they are not a record of change.
Let me put it another way.
A married woman who changes her name to match that of her spouse cannot have her birth certificate altered to reflect that.
Why? Because it's not the name she was born with.
A drivers licence and other methods of identification display any changes made after that fact. Even a passport can be altered if you want to live as something else.
The point of the bloody thing is to be a record of birth. Is that point so very difficult to understand?