I'm not sure what/who it is we are comparing Ueshiba with/to.
If you want to talk about physicality in old age, Ueshiba has some stiff competition. Jack Lalanne 1984 Age 70: Handcuffed, shackled and fighting strong winds and currents, towed 70 boats with 70 people from the Queen's Way Bridge in the Long Beach Harbor to the Queen Mary, 1 ½ miles.
Ueshiba wasn't competing at anything into old age. He was teaching martial arts, and as he got latter in life, he wasn't actively doing lots of that. So if we compare him to his peers, there are lot's of martial artists like him. If we compare him to top level athletes like Jack Lalanne, who were interested in physical activity late in life, he's coming up short.
Comparisons are interesting things.
But did you simply bypass my main question, or are you saying, modern athletics provides us with everything we need, so we don't need the example of Ueshiba any more in aikido, or we don't need internal training or what?