@Faizal_Ali this a fun story! Thanks.
If 18% of population was de Novo created we would expect to find evidence of this. We do not find evidence of this. So absence of evidence, in this case, is evidence of absence.
In contrast, the GAE is not expected to leave evidence. Absence of evidence, in this case, is not evidence of absence.
Finally, even if a person does not descend from Adam, this does not imply Jesus is not relevant. That gets into theology beyond our scope, but your reasoning there is flawed.