They are terms that one can't apply to oneself. It's fine for other people to call me a thought leader, but I can't say it myself. I suspect this may also apply to "entrepreneur".
I think you can call yourself an entrepreneur if you start a business and nobody will think twice. The definition Google gives is, "a person who organizes and operates a business or businesses, taking on greater than normal financial risks in order to do so," which is rather clear.
I agree on the other two. It's like giving yourself a nickname.
I can't believe people downvoted you for talking about yourself in a manner that could be considered arrogant except they didn't realize you were actually just being hypothetical.
And then it's mistaken instead to be a direct insult because the same people who don't have a firm enough grasp on the English language to correctly comprehend hypothetical speech in the first-person case are also not going to understand the hypothetical second-person case either; instead, these people will also misconstrue that the speaker is directly referring to themselves.