I’m sorry but there’s no way any of the old people you know could deal with a teenager and associated issues.
Maybe your world is very narrow @HermioneKipper?
Many grandparents in their 80s are a valuable source of support in many ways to teenage grandchildren. They don't have to be picking them up from clubs at 2am to be able to offer guidance and emotional support.
When JPJ is older, she will have help in many shapes and forms.
She's an exceptional and high achieving woman in many ways already and what she can offer her child however long they may be together is likely to be valuable.
We simply don't know enough about the circumstances of the baby and its parentage. The donor father may be her partner. The birth mother may be a family member. The child may have been 'adopted' rather than a surrogate baby.
JPJ was interviewed on Woman's Hour about this, last week. Maybe listen to it?
On balance, I agree that 64 is very late indeed to bring up a baby and as a modus operandi, not to be endorsed. But without knowing the full story and the contingency plans in place, I don't think it's fair to be judgemental.
Can I suggest that you are