Certainly not. But some have received good predictions from the public, from wins in previous events (for example, they have won at the Golden Globe and other events), of course, this will increase confidence that he could be the strongest candidate to win.
There is even a rather sad case when Eddie Redmayne won the Best Actor Oscar beating Michael Keaton (Birdman). Eddy excelled in his role as Stephen Hawking in Theory of Everything, while at that time Michael was predicted to win because he succeeded in playing the character of a dim superhero actor in his old age. What happened was that Keaton was caught on camera putting the speech back into his jacket pocket when he realized that Eddie’s name was being called, not him. this is proof that no one knows who will win and lose, regardless of how strong the public is waiting for him to win.