Even the age cut off for Canada of 50 I think is a bit too old to be having children. The child would be 10 and the mother then 60. In most cases the man is older than the woman too. Not all 60 year olds are physically active enough to keep up with a young and energetic 10 year old. Dang, I had my last son and went through more tests with him than I did with my last two just because I had passed the age of 35 (if I had gotten pregnant just one year earlier they would not have done additional tests) as they say the older you get the greater chance of health risks to the child too. Granted there are several energetic and physically fit 60 year olds but how do you know what you will be at 60 until you reach that age?
I also believe the older you get the less patience you would have with raising children. My Mother babysat children for many years and I recall her words that she loves children but is happy to see them go home at the end of the day as she just does not believe she could raise them 24/7 anymore. She also had 7 children of her own all were grown by that time and I was the last of them and was a teenager at the time.
I also know for a fact she did not keep up with me and I took off many a time and knew she would never follow and just sit and wait for me to reappear. She did not have the energy to go up and down the hill or walk too far in search of me and I knew it. I knew I would never be checked up on by her ever.
I was the daughter of one of her daughters and she had adopted me to keep me in the family. She had developed arthritis in her knees and required knee surgery that she refused to have etc... I ended up going to the lake and taught myself to swim with no supervision and many things on my own. Not that I view that as a bad thing as I feel it makes one independant and makes one realize you can do things on your own. I knew how to set my own limits and restricted myself to shallow waters to start and had a sense of my limitations as I developed at my own pace. But, I tell you I am happy to witness my sons developments and to be there and see for myself.
I suppose however that they could pay to have people do things with their children and put them in all the programs and activities that the children require and provide for their children in that manner. If finances permit if they cannot get around as well in 10 more or so years they could get nannies etc... But to me that just takes away from the meaning of parent. I guess I am still one who would prefer to do it on my own.