Definitely. I have been doing this for a long time and I have a lot of experience. I know what works for ME, but that does not make me qualified to be a trainer. Sure I will give advice on form and technique and such, but I would never try to pass myself off as an expert trainer.
And I hate watching people take advantage of others because they either do not have an idea about what to do themselves or they are desperate for quick (temporary) results.
Alright off the soapbox.