If that's a coping mechanism, you have a setting-yourself-for-failure mechanism by attributing so much of your potential to success to your own height.
Religion aside, your father is just being realistic, as far as I'm aware. Maybe you'll be the next person to die from complications of this procedure, despite the reason why you wanted it in the first place. You could also just randomly get a much too late diagnosis for cancer as you're finally hitting it off in terms of finances and success. So much for that. This is also a redpill of life.
The fact that he considers a generation of kids who stare at their phones all day superior to the generation that every single ad on TV is geared towards and created the most wealth in the history of the US, based on a ~0.5 inch height increase means 2 things
- He hasn't seen the real world for what it is
or
- He's been trolled, 4channed, bb.comed out of reality
Maybe both.