Jorge does make a valid, if blunt point. I wouldn't take it personally; it doesn't seem like it was directed towards you personally, rather I think he was making a point of what it may appear to a Brazillian local - I suspect someone coming just to photograph the poor, and not seeing the beautiful of the country as well, would be offensive.

I feel that you probably should only take the invitation if it allows you to do what you do best; to photograph those things you do best. I know if I went, it would be to photograph the natural places.