I don't agree that often with the mighty Sureshs but I agree with him here. I believe Ian is close to 40, hardly a young teaching pro right out of college and has mentioned that he hasn't played a lot of competitive tennis matches until recently and focused more on coaching.
From Ian's perspective, his glory days of playing are over and he can only go down, while GSG can only go up for the next few years at least. That is a big difference in mentality. I just read an interview with Navratilova about how she is slowly trying to start tennis again after the pandemic ("the longer you don't play tennis, the more you don't want to play it"), how she is more into cooking and painting these days, and how she was preparing to have Chris Evert over for dinner that evening. Just goes to show how priorities change with time even for someone who is among the all-time greats.