its as simple and as easy as that.

many people have the conception that being a personal trainer you either listen to peoples problems all day or you are dodgy and promise people the world and give them an atlas. 
Admittedly there's both of those things going, but not with as many people as you think. Personally myself, I believe in what I do , I don't have any flashy marketing, money back guarantees, working side by side with a supplement company. Its just me my word, and how I accept payment from people. 
Why would people invest in me consistently without even knowing me? And then keep working with me consistently , even at the 'risk' of no money back if they fail to achieve what they set out.

Firstly its on  you, its always on you, I can show you the more effective way , but it's up to you to utilize that information, the same with me/my business/my physique. I've had mentors , trainers, coaches, some have completely changed me for the best, others I've let their knowledge and effort in me goto waste. 

We all do it, its part of life. Either accepting responsibility or laying blame. But the other thing , its not always about obtaining this 'one' goal you set out to do , sometimes its about the journey along the way, what you learn, who you become, how you grow. You might realize you have a new goal. You might realize you cant keep going full throttle from one goal to the next, you might think 'maybe I want to find the balance between working hard, and enjoying my life' 

An these are the people I work with, and that's why most of my clients continue to work with me long term, because were not chasing goals, were creating lifestyles - and amazing physiques to go with them.