@Nick Noon Love the post. I can see the passion that you will carry into the industry and show all the nay-sayers how it's done. I hear these people all the time and it can start to be a cancer if your around them too long so watch out. I guess the trick is to turn around what they say in your head into something constructive (your examples are exactly what I'm referring too).
Another reason that you will probably hear this from some people is because THEY want to offer YOU their services and convince you why you shouldn't enter the market yourself (applies to those active in RE market obviously) so they can benefit. There are many people who are possesive by nature (if he has that then I should have that, if I have this then I want to keep others from getting it). They also don't want anybody that they know nipping at their heels (future competition) which would make it harder for them to "keep up with the Jones".