Your really surprise when you ask a question like this ? There are as many opinions as there are cameras, probably more. Sometimes people might advice based on what they have and like, sometimes people might advise on what they have read on the internet. Sometimes people don't consider what the camera will be used for. DSLR cameras give great images but they are not as intuitive to use as video cameras for video as they are really made to take still. You often have to get more kit to make them more usable for video. BUT you can use them and get great looking images straight out of the box. Advising the best camera in the world for someone who has never used a camera before would be bad advice. Some people don't like to recommend something too expensive. Are we beginning to see a pattern here. There are lots of variables and opinions in the "what is the best camera for me" type of question.
That is some reasons.