> So people who don't conceptualize themselves as athletic, they may have insecurities if not outright skepticism, aren't going to last

I have always been thin and tried to start workouts on my own several times over many years, and never could do it, mostly because I didn't know what I was doing. Hiring a personal trainer, if you can afford it, is a great way to get over this hump. I quit after a couple of years and workout on my own now, but couldn't have done it without the trainer.