Or, it's like the idea doesn't have the magic of an idea that you can't do right now but won't require any effort when the time is right- like "I could get up every few minutes and stretch and walk around already! That can't be it... I need to buy a standing desk and that'll make me stand all day so I'm healthy."
Like a device giving you electric shocks every 10 minutes to make you remember to change your posture.
And maybe I am a pessimist as well, but I see your statement as simply a realistic one. :)
Plenty of very experienced and intelligent PTs have repeated the statement I simply regurgitated as well.