I think I feel differently about the two of them to be honest.
With her, I think she may have reached her potential and no matter how much training she does she isn’t going to improve. She represents the vast majority of us. I think it is harsh to say that just because she has a lot of time she could get better times- there will be a limit to what she can achieve. There may be an odd pb on a good day with a good course but other than that I think she is in cloud cuckoo land if she thinks her running career is a gradual, overall, upward trajectory.
With him, he is a different kettle of fish so to speak. He is obviously a very talented runner and although he will have a cap, I think he is limiting that by his arrogance surrounding his training. He could easily get below 15 and 2.20 if he rested, cross-trained and ate well. He could do so well but the last 5 years have been essentially wasted by him thinking he knows best.
Just my thoughts. I may be wrong. I thought I knew best once. Didn’t end well.