Depends on why the friend is fat and poor. Could be they're disabled, in which case they're basically SOL. Wheelchairs are incredibly expensive, it's hard to cook in one unless one pays $$$ for home modifications, removes a wide range of exercise options...
The friend is fat and poor because they eat unhealthy, spend most of their time sitting down watching YouTube or playing games, and work a low skill job because they do not have a skill that will pay them more.
That "eventually" covers a lot of ground, and is literally the opposite of "just" in "just do it". Therapists help you get to the point where you can actually do something.
Your mileage may vary, but my experience is that they tell you to just do it, explaining the reasons why it comes down to just doing it each time. They listen to your BS reasons for not doing it in between to let you vent, then tell you again that if you want to do it just do it.
I readily admit that there are differences between a therapist and a random internet stranger. An internet stranger is not paid to listen to your excuses and work them around to the question of why don't you just do it. Some people seriously need the coaxing and empathetic here. At the end of the day however, the message is the same. You want to do it, just do it.
