The judgment on this thread is off the scale. And I bet most of the judgiest have their own children already, having conceived easily in their 20s and 30s or whatever ages they consider socially acceptable. I'm not wild about surrogacy because I doubt in general it is done entirely freely and voluntarily. Poverty is a massive part of it for many, I imagine, though not all.
But the ages people have their children is their business and frankly, so long as they care for them, provide for them and don't abuse them, it's no one else's business. With all the hideous stories of child abuse in the news all the time, frankly Jon Snow having a baby at 70 should be the least of anyone's worries.